I did not play most of HF crusade stuff since they're shitty, but this is stupid to another level.

This is an old vanilla bug. In CK2 if a title was set_title_landless by script in a game, it does not stay landless after you loaded a savefile, which the title is not in landless status.
In other words, title mapping of CK2 is not clean up when resign and load another save.

Take e_mongol_empire as example, fire event 60500, Genghis could start invading eastern edge of map in most of time, with a e_mongol_empire title set as landless to allow it being there till Genghis holds at least one province, and a flag temporary_landless_title for triggering an event to set the title back to normal status.

However if I save a game at first time and quit to the desktop, restart and load the savegame. The game now take e_mongol_empire as a normal title since any title status is imported from /landed_titles and savefile doesn't containing such a meta data.
The poor Genghis will lost his title due to unland and his war goes invalid.

I use an on_start hook event to check if this is a savegame or not, and filter any_title with temporary_landless_title flag and then manually set it up to make sure it working.
I'm not sure what style of fix you tend to do, so I post an issue first instead a pr.

common/achievements.txt stores triggers of Steam Achievements, which is not possible to fire with a mod like CleanSlate
However it still processed by the game engine and takes CPU times.
By emptying this file, the game can run ~6%* faster. It's a very cheap and easy way to gain performance with no risks of touching other content files.

*1.059 faster, bm 1066.9.15 start, total_years_played == 5, observation
**it might vary on devices

CleanSlate bug
misused 'any_close_relative' instead of 'any_dynasty_member',
making it not equivalent to vanilla tooltip

bug report: https://forum.paradoxplaza.com/forum/threads/mod-resource-cleanslate.1339429/post-28049682

Hello, I hope you are having a great day. I have a big problem with Crusader Kings 2. Where the coat of arms of counties are popping up and don't go away when I press the religious map mode or any map mode. It is super frustrating, annoying and it makes me sad since when I first installed the game I played it for weeks and this never happened. If you can help me. Thank you in advance.

(Some people said it is unfixable, I still have hope that it is fixable.)

CleanSlate Bug
The Consolidated province revolt triggers fix(cb5bfc5) introduce two bug

• One is that a regular war, like claim, can block Nationalist/Religious revolts from triggering
  For instance,
  

  CleanSlate/CleanSlate/events/oldgods_rebel_events.txt

  Lines 178 to 189 in 95abb69

  	NOT = { # Not if there is already an ongoing revolt
  	top_liege = {
  	any_war = {
  	defender = { character = PREV }
  	trigger_if = {
  	limit = { using_cb = peasant_revolt }
  	war_title = ROOT # The province
  	}
  	}
  	}
  	}

  
  It's not proper to use trigger_if here and will result any war, rather than peasant_revolt liberation_revolt or heretic_revolt, returning true in the condition. Thus revolts blocked.

• Second, there's duplicated checks of ToG DLC, it's unnecessary
  

  CleanSlate/CleanSlate/events/oldgods_rebel_events.txt

  Lines 55 to 71 in 95abb69

  	else_if = {
  	limit = {
  	OR = {
  	has_castle = yes
  	has_tribal = yes
  	has_temple = yes
  	has_city = yes
  	}
  	has_dlc = "The Old Gods"
  	}
  	# Heretic revolts have the highest priority
  	if = {
  	limit = {
  	is_heresy_of = top_liege
  	has_dlc = "The Old Gods"

I don't think you should be able to sway yourself. Does it have any events related to it?

Worship the ancestor decision cannot be used.
1.Start the game as african leader with african fait
2. click Worship the ancestor decision

AR: grayed
ER: should be available

Note: maybe repro with other religions

laws In CleanSlate, is_feudal = yes is used to replace obsoleted is_nomadic = no is_merchant_republic = no is_patrician = no trio.
The good thing is that some weirdo variants have been also fixed, such as theocracy Byz and republic Byz not using open elective.
But when it comes to tribal, I think it's not comprehensive.
Unlike governments besides feudal/tribal, tribal government do not lock into one certain succession law.
In vanilla , succ_byzantine_elective works good with tribal Basileus, it occasionally happens.
In CleanSlate, succ_byzantine_elective was blocked from tribal Basileus and force him to adopt the failsafe - gavelkind,
it would make Byz lost its imperial_government since then, even if inherited or claimed by a feudal heir.
And so do HRE.

If it’s designed like this on purpose, I can understand. But if not, I think we can discuss about it.

When opening the view of any castle-type barony, there are copies of every level 1 building, which when built become blue as if there were no level two. Inspecting the save, the building flag (say, ca_) is duplicated, but when loading the spurious building returns to being unbuilt.

This doesn't happen with temples, cities or tribes.

67001, the player is asked by the papal emissary to adopt papal investiture

However, the law is going to apply in option block, depending on the choice.
It gives the player a chance to swap their primary_title if there's more than one available, take the option and then swap back.
Leaving the original primary_title stays in free investiture.

I'd suggest a primary_title = { save_event_target_as = title_being_demanded } first in immediate block. So it always fires on the target title.

I was playing as a catholic ruler and adopted secretly Fraticielli (toghether with my bishop) . I tried finiding the character interaction to try to make people join my secret cult but it wasnt there, nor on my children, nor my wife. I may not understand how this mechanic works tho. If so sorry for the issue spam.

769 bm, if a player picks up house Papar and press Play, he gets gameover right now.

Leave CleanSlate aside, though I think 769 iceland is history inaccurate (sigh
But CK2 engine did not like wasteland tricks I used in Iceland's settlement mod, it spamming a shitty ton of warnning in log.

769 bm is horrible...

In CleanSlate the law enacting was separated in two steps,
First is revoke conflicting laws in a group and apply related effects if any,
Second is setting up commands that change actual play.
However it would cause history law setup failure, take e_hre for example

Heritage - Child may adopt the educator's culture and/or religion feature not working with this mod, no events for culture/religion change even if you play as a child.

When rebellion/uprising happens you can't navigate to their army by clicking on the rebellion leader portrait.

antagonize events, such as HF.22012

Not sure about sway events, did not play as a friendly guy.

Suggested fix:
Append Root scope first, like [Root.antagonize_target.GetTitledFirstName].

Vanilla exploit, persist in CleanSlate.

It could happen when a bishop become heresy, accepted demanding conversion, etc.. and the death of the Pope comes just in time.
(The religious_titles that controls the succession line requires a few days to update.)
Thankfully, it's pretty easy to fix in CleanSlate.
By revoking religious_titles of the apostasy in convert_religion_failsafe_effect, it immediately disqualify the apostasy.
Keep the Holy See not going astray.

I noticed a problem and that was Wen nwillhelm successfully conquered England.... Doesn't the Anglo-Saxon culture change into the English culture, is that a bug?

Rather minor but annoying glitch
It render wrong government in character selection screen, but corrected once game started (has_game_started = yes)

CleanSlate

check his government, is feudal

CleanSlate - Ingame

check his government, goes tribal

Vanilla

check his government, is tribal

I think this is related to some vanilla history/provinces farces (avar tribal > feudal > magyar tribal again...)
dumb CK2 don't handle these changes on-fly, just like what we had in the iceland...
The trigger you used in government_trigger is still...somehow mystic.

Again, this is not a gameplay broken bug, but rather an annoying one.

As screenshot, I did not own any baron there but it has no war fog applied.
And I can do diplomatic action with rulers there.

It seems that vanilla Borovichi is 1652, which is Arigh, Maghreb in CleanSlate and causing this bug. Still finding what exactly the bug file located.

Steps to reproduce: 936 bm, play as Emir Abdallah of Beja.

Not sure which event is this adventure target script broken, it happened in middle of a game observing.
Sorry can't provide more information.

no landed characters have Castilian, Mandé, Latgalian, Estonian, Frankish, or Nenets as their culture, instead having "noculture"

Step to reproduce:

1. Play any catholic ruler, revoke a bishop.
2. Grant the newly revoked temple to a courtier.
3. He's a baron now.

It seems the suffering is not over yet. But thankfully that your old scripts works here this time.

theocratic_group_allow_trigger = {
	trigger_if = {
		limit = { has_game_started = yes }

-		is_theocracy = yes
+		is_feudal = no
+		is_tribal = no
+		is_nomadic = no
+		is_republic = no
	}
}

Not comprehensively tested, there might be reason you changed it. but I don't know.

Bug found and tested on female cathar>catholic rulers when trying to exploit female Pope in CleanSlate.

after choosing a life, a spy and after choosing a target, when you write, you want to substitute a character in prison for -50 reputation, nothing happens

Not visible on the screen (he is 14)

CleanSlate bug

• portrait p18, p19 not displayed. Using vanilla scripts fixes the bug, but I guess you have some idea about it.

• HF.20406 only check has_landed_title and then add_trait, ignoring whether the artifact is actually held and is active or not.
  That said, HF.20415 is not properly merged into HF.20406.
  

  CleanSlate/CleanSlate/events/HF_coronation_events.txt

  Lines 15038 to 15055 in 553d802

  	trigger_switch = {
  	on_trigger = has_landed_title
  	e_hre = { add_trait = dead_crown_hre }
  	e_byzantium = { add_trait = dead_crown_byzantine }
  	e_persia = { add_trait = dead_crown_pahlavi }
  	k_italy = { add_trait = dead_iron_crown_lombardy }
  	k_hellenic_pagan_reformed = { add_trait = dead_scepter_hellenic_fylkir }
  	d_norse_pagan_reformed = { add_trait = dead_crown_fylkir }
  	d_tengri_pagan_reformed = { add_trait = dead_crown_tengri_fylkir }
  	d_finnish_pagan_reformed = { add_trait = dead_crown_finnish_fylkir }
  	d_slavic_pagan_reformed = { add_trait = dead_crown_slavic_fylkir }
  	d_baltic_pagan_reformed = { add_trait = dead_crown_romuva_fylkir }
  	d_west_african_pagan_reformed = { add_trait = dead_crown_west_african_fylkir }
  	d_zun_pagan_reformed = { add_trait = dead_crown_zun_fylkir }
  	d_aztec_pagan_reformed = { add_trait = dead_crown_aztec_fylkir }
  	d_bon_pagan_reformed = { add_trait = dead_scepter_bon_fylkir }
  	}

A rather weird bug. I attached screenshots for better understanding.

Before

After Low tribal organization applied

(Please ignore in-game date, I did not take screenshots in time sequence.)


tribal_organization_0 was added. This bug won't be triggered if I did not have centralization_2 at the beginning.
It seems that a fallback mis-triggered when add_law = centralization_1 fired in the pass_effect block.
I tried to debug but I'm not that good at law modding. Sorry I can't help more.

A dirty fix is to place revoke_law sequence after if block, in case of the quirk is hard coded.

tributary_nomad_cb doing make_tributary first and following a remove_tributary, which will cancel the previous effect.
Swapping the order of two effects fixes it.

Seems like raising a new vassal for a city still defaults to agnatic open elective, shouldnt it be true cog?

					trigger_if = {
						limit = { is_republic = yes }

						has_dlc = "Conclave"
						is_patrician = yes

						trigger_if = {
							limit = { independent = no }

							defacto_liege_title = {
								OR = {
									has_law = true_cognatic_succession
									has_law = cognatic_succession
									has_law = enatic_cognatic_succession
								}
							}
						}
					}

I think this block only applies to patrician republics, should there be another for plain city republic? Not sure why the insert code function isnt working right for me.

While playing tribal unreformed germanic pagan and using the targeted decision to request a mass conversion,, even if the tooltip says the sponsor will accept no event fires to do the actual mass conversion, tried using the targeted decision then changing character to the sponsor to see if the event is visible to no avail

Two related bugs inherited from vanilla (I checked) in this event. Both of these bugs center around a character receiving the character flag wargame_win6

Missing victory description text

The event description is set after checking for a flag on the character receiving event, which all are variations of the following code:

desc = {
	trigger = { has_character_flag = wargame_win1 }
	text = EVTDESC_WOL_11140_WIN1
}

The following character flags are all checked for:
wargame_win1
wargame_win2
wargame_win3
wargame_win4
wargame_win5
wargame_loss1
wargame_loss2
wargame_loss3
wargame_loss4
wargame_loss5
wargame_loss6
wargame_loss7
wargame_loss8

However, it's possible to reach this event with the character flag wargame_win6, which is NOT checked for, and therefore doesn't have proper description text.

Victor receives defeat "prize"

As part of this event, the options that grant the rewards for victory both have the following among their conditions to appear:

OR = {
	has_character_flag = wargame_win1
	has_character_flag = wargame_win2
	has_character_flag = wargame_win3
	has_character_flag = wargame_win4
	has_character_flag = wargame_win5
}

As mentioned early, it's possible to reach this event with the character flag wargame_win6. In that scenario you can't receive the victory rewards and always lose prestige instead of gaining prestige (or progressing the associated permanent character modifier)

Despite both places where the Paradox scripters forgot about this possible character flag, it IS cleared properly in the event's after block.

CleanSlate bug

Government:

(L CleanSlate, Unplayable republic patrician)
(R Vanilla/Fixed, Playable mr patrician)

Law:

(L CleanSlate, Gavelkind)
(R Vanilla/Fixed, Seniority)
It happens when the Conclave dlc being disabled.

CleanSlate bug, due to rename the tag 'catholic_pilgrimage' to christian_pilgrimage

The only place I see it mentioned is in, events\HF_bloodline_events.txt, but events to create both religious bloodlines are completely commented out, and the events that should lead to them do it instead to the creation of event_family_bloodline_01, I think. There are possibly more events that lead to the incorrect bloodline, though I haven't fully checked.

Hello,

I am playing with 1.0Beta4 and have noticed that the localisation button for event MnM.4428 does not write out the title for the society leader. Looking up the event by enabling charinfo and Ctrl-right-clicking on the button, I can see that the relevant key is EVTOPTA_MNM_4428, which happens to be located in /CleanSlate/localisation/13_mnm_monastic_orders_events.csv and has the following English form:

EVTOPTA_MNM_4428;You honor me, [Society.GrandMaster.GetSocietyRank];

Note that the event immediately below it, which is the failure event for the same decision, has a different way of picking the leader's title:

EVTOPTA_MNM_4429;I have failed you, [monastic_leader.GetSocietyRank].;

I am not sure whether it would work to simply replace Society.GrandMaster with monastic_leader, but it would seem to work at least in this case, as the event mentions event_target:monastic_leader. In any case, I think Society.GrandMaster would probably need to be replaced everywhere?

Thanks for the attention.

1. main character have a daughter
2. daughter is matrilineally married to a person with a historical bloodline
3. granddaughter is born with a historical bloodline
4. main character forged a bloodline
5. daughter receive forged bloodline
6. granddaughter do not receive  forged bloodline

Note" bloodline is " The Conqueror (Blood of___) "

I found there're many provinces have different terrain comparing to vanilla.
Using following script for testing

any_province = {
	limit = {
		terrain = arctic
	}
	log = "[This.County.GetName] is arctic terrain"
}

Result(Vanilla)

49 Lines/Provinces, alphabetized

[effectimplementation.cpp:18398]: EVENT [769.1.1]:--- is arctic terrain
[effectimplementation.cpp:18398]: EVENT [769.1.1]:Austisland is arctic terrain
[effectimplementation.cpp:18398]: EVENT [769.1.1]:Bjarmia is arctic terrain
[effectimplementation.cpp:18398]: EVENT [769.1.1]:Bolshoy Yugan is arctic terrain
[effectimplementation.cpp:18398]: EVENT [769.1.1]:Dvina is arctic terrain
[effectimplementation.cpp:18398]: EVENT [769.1.1]:Hlynov is arctic terrain
[effectimplementation.cpp:18398]: EVENT [769.1.1]:Illyinsk is arctic terrain
[effectimplementation.cpp:18398]: EVENT [769.1.1]:Indiga is arctic terrain
[effectimplementation.cpp:18398]: EVENT [769.1.1]:Izhma is arctic terrain
[effectimplementation.cpp:18398]: EVENT [769.1.1]:Kanin is arctic terrain
[effectimplementation.cpp:18398]: EVENT [769.1.1]:Keltma is arctic terrain
[effectimplementation.cpp:18398]: EVENT [769.1.1]:Khantia is arctic terrain
[effectimplementation.cpp:18398]: EVENT [769.1.1]:Khlynov is arctic terrain
[effectimplementation.cpp:18398]: EVENT [769.1.1]:Kola is arctic terrain
[effectimplementation.cpp:18398]: EVENT [769.1.1]:Kolguyev is arctic terrain
[effectimplementation.cpp:18398]: EVENT [769.1.1]:Kolva is arctic terrain
[effectimplementation.cpp:18398]: EVENT [769.1.1]:Koshma is arctic terrain
[effectimplementation.cpp:18398]: EVENT [769.1.1]:Kudymkar is arctic terrain
[effectimplementation.cpp:18398]: EVENT [769.1.1]:Kuloy is arctic terrain
[effectimplementation.cpp:18398]: EVENT [769.1.1]:Mansia is arctic terrain
[effectimplementation.cpp:18398]: EVENT [769.1.1]:Mezen is arctic terrain
[effectimplementation.cpp:18398]: EVENT [769.1.1]:Narim is arctic terrain
[effectimplementation.cpp:18398]: EVENT [769.1.1]:Norðland is arctic terrain
[effectimplementation.cpp:18398]: EVENT [769.1.1]:Onega Peninsula is arctic terrain
[effectimplementation.cpp:18398]: EVENT [769.1.1]:Perm is arctic terrain
[effectimplementation.cpp:18398]: EVENT [769.1.1]:Pil'va is arctic terrain
[effectimplementation.cpp:18398]: EVENT [769.1.1]:Pinega is arctic terrain
[effectimplementation.cpp:18398]: EVENT [769.1.1]:Sedyu is arctic terrain
[effectimplementation.cpp:18398]: EVENT [769.1.1]:Severnaya is arctic terrain
[effectimplementation.cpp:18398]: EVENT [769.1.1]:Snopa is arctic terrain
[effectimplementation.cpp:18398]: EVENT [769.1.1]:Suðurland is arctic terrain
[effectimplementation.cpp:18398]: EVENT [769.1.1]:Syrj is arctic terrain
[effectimplementation.cpp:18398]: EVENT [769.1.1]:Tavda is arctic terrain
[effectimplementation.cpp:18398]: EVENT [769.1.1]:Tobysh is arctic terrain
[effectimplementation.cpp:18398]: EVENT [769.1.1]:Tom is arctic terrain
[effectimplementation.cpp:18398]: EVENT [769.1.1]:Tsilma is arctic terrain
[effectimplementation.cpp:18398]: EVENT [769.1.1]:Ugra is arctic terrain
[effectimplementation.cpp:18398]: EVENT [769.1.1]:Ural is arctic terrain
[effectimplementation.cpp:18398]: EVENT [769.1.1]:Vashka is arctic terrain
[effectimplementation.cpp:18398]: EVENT [769.1.1]:Vasyugan is arctic terrain
[effectimplementation.cpp:18398]: EVENT [769.1.1]:Vel is arctic terrain
[effectimplementation.cpp:18398]: EVENT [769.1.1]:Veliky Ustug is arctic terrain
[effectimplementation.cpp:18398]: EVENT [769.1.1]:Velsk is arctic terrain
[effectimplementation.cpp:18398]: EVENT [769.1.1]:Vestisland is arctic terrain
[effectimplementation.cpp:18398]: EVENT [769.1.1]:Vishera is arctic terrain
[effectimplementation.cpp:18398]: EVENT [769.1.1]:Vychegda is arctic terrain
[effectimplementation.cpp:18398]: EVENT [769.1.1]:Vym is arctic terrain
[effectimplementation.cpp:18398]: EVENT [769.1.1]:Yamalia is arctic terrain
[effectimplementation.cpp:18398]: EVENT [769.1.1]:Zavarot is arctic terrain

Result(CleanSlate)

61 Lines/Provinces, alphabetized

[effectimplementation.cpp:18398]: EVENT [1066.9.15]:--- is arctic terrain
[effectimplementation.cpp:18398]: EVENT [1066.9.15]:Austisland is arctic terrain
[effectimplementation.cpp:18398]: EVENT [1066.9.15]:Bjarmia is arctic terrain
[effectimplementation.cpp:18398]: EVENT [1066.9.15]:Bolshoy Yugan is arctic terrain
[effectimplementation.cpp:18398]: EVENT [1066.9.15]:Borovichi is arctic terrain
[effectimplementation.cpp:18398]: EVENT [1066.9.15]:Calarasi is arctic terrain
[effectimplementation.cpp:18398]: EVENT [1066.9.15]:Dvina is arctic terrain
[effectimplementation.cpp:18398]: EVENT [1066.9.15]:Hlynov is arctic terrain
[effectimplementation.cpp:18398]: EVENT [1066.9.15]:Illyinsk is arctic terrain
[effectimplementation.cpp:18398]: EVENT [1066.9.15]:Izhma is arctic terrain
[effectimplementation.cpp:18398]: EVENT [1066.9.15]:Kanin is arctic terrain
[effectimplementation.cpp:18398]: EVENT [1066.9.15]:Karachev is arctic terrain
[effectimplementation.cpp:18398]: EVENT [1066.9.15]:Keltma is arctic terrain
[effectimplementation.cpp:18398]: EVENT [1066.9.15]:Khantia is arctic terrain
[effectimplementation.cpp:18398]: EVENT [1066.9.15]:Khlynov is arctic terrain
[effectimplementation.cpp:18398]: EVENT [1066.9.15]:Kola is arctic terrain
[effectimplementation.cpp:18398]: EVENT [1066.9.15]:Kolguyev is arctic terrain
[effectimplementation.cpp:18398]: EVENT [1066.9.15]:Kolva is arctic terrain
[effectimplementation.cpp:18398]: EVENT [1066.9.15]:Koshma is arctic terrain
[effectimplementation.cpp:18398]: EVENT [1066.9.15]:Kozelsk is arctic terrain
[effectimplementation.cpp:18398]: EVENT [1066.9.15]:Kromy is arctic terrain
[effectimplementation.cpp:18398]: EVENT [1066.9.15]:Kudymkar is arctic terrain
[effectimplementation.cpp:18398]: EVENT [1066.9.15]:Kuloy is arctic terrain
[effectimplementation.cpp:18398]: EVENT [1066.9.15]:Kursk is arctic terrain
[effectimplementation.cpp:18398]: EVENT [1066.9.15]:Mansia is arctic terrain
[effectimplementation.cpp:18398]: EVENT [1066.9.15]:Mezen is arctic terrain
[effectimplementation.cpp:18398]: EVENT [1066.9.15]:Narim is arctic terrain
[effectimplementation.cpp:18398]: EVENT [1066.9.15]:Norðurland is arctic terrain
[effectimplementation.cpp:18398]: EVENT [1066.9.15]:Novosil is arctic terrain
[effectimplementation.cpp:18398]: EVENT [1066.9.15]:Onega Peninsula is arctic terrain
[effectimplementation.cpp:18398]: EVENT [1066.9.15]:Perm is arctic terrain
[effectimplementation.cpp:18398]: EVENT [1066.9.15]:Pil'va is arctic terrain
[effectimplementation.cpp:18398]: EVENT [1066.9.15]:Pinega is arctic terrain
[effectimplementation.cpp:18398]: EVENT [1066.9.15]:Priluk is arctic terrain
[effectimplementation.cpp:18398]: EVENT [1066.9.15]:Rylsk is arctic terrain
[effectimplementation.cpp:18398]: EVENT [1066.9.15]:Sedyu is arctic terrain
[effectimplementation.cpp:18398]: EVENT [1066.9.15]:Severnaya is arctic terrain
[effectimplementation.cpp:18398]: EVENT [1066.9.15]:Snopa is arctic terrain
[effectimplementation.cpp:18398]: EVENT [1066.9.15]:Soyma is arctic terrain
[effectimplementation.cpp:18398]: EVENT [1066.9.15]:Suðurland is arctic terrain
[effectimplementation.cpp:18398]: EVENT [1066.9.15]:Syrj is arctic terrain
[effectimplementation.cpp:18398]: EVENT [1066.9.15]:Tavda is arctic terrain
[effectimplementation.cpp:18398]: EVENT [1066.9.15]:Tikhvine is arctic terrain
[effectimplementation.cpp:18398]: EVENT [1066.9.15]:Tobysh is arctic terrain
[effectimplementation.cpp:18398]: EVENT [1066.9.15]:Tom is arctic terrain
[effectimplementation.cpp:18398]: EVENT [1066.9.15]:Tsilma is arctic terrain
[effectimplementation.cpp:18398]: EVENT [1066.9.15]:Ugra is arctic terrain
[effectimplementation.cpp:18398]: EVENT [1066.9.15]:Ural is arctic terrain
[effectimplementation.cpp:18398]: EVENT [1066.9.15]:Vashka is arctic terrain
[effectimplementation.cpp:18398]: EVENT [1066.9.15]:Vasyugan is arctic terrain
[effectimplementation.cpp:18398]: EVENT [1066.9.15]:Vel is arctic terrain
[effectimplementation.cpp:18398]: EVENT [1066.9.15]:Veliky Ustug is arctic terrain
[effectimplementation.cpp:18398]: EVENT [1066.9.15]:Velsk is arctic terrain
[effectimplementation.cpp:18398]: EVENT [1066.9.15]:Vestisland is arctic terrain
[effectimplementation.cpp:18398]: EVENT [1066.9.15]:Vishera is arctic terrain
[effectimplementation.cpp:18398]: EVENT [1066.9.15]:Vorotynsk is arctic terrain
[effectimplementation.cpp:18398]: EVENT [1066.9.15]:Vychegda is arctic terrain
[effectimplementation.cpp:18398]: EVENT [1066.9.15]:Vym is arctic terrain
[effectimplementation.cpp:18398]: EVENT [1066.9.15]:Yamalia is arctic terrain
[effectimplementation.cpp:18398]: EVENT [1066.9.15]:Zavarot is arctic terrain
[effectimplementation.cpp:18398]: EVENT [1066.9.15]:Zvenyhorod is arctic terrain

has_disease_trigger had been removed in 0c968bb, but still in

I have frequently CTD with CleanSlate, it turn out to be some dlc related files was moved and loaded in the base game with Cleanslate.
For people who did not own proper DLCs or who simply hate it and not enable it, they could get CTD with something like this in error.log.
[virtualfilesystem.cpp:753]: Could not open file: gfx/models/arabian_ship.xac, error: not found
Graphic files modding are a bit tricky here, and separating Cleanslate into correspoding content pack patch is the Paradox dumb way...

Maybe an Installer?...(facepalm