Buildmode mode button don't pick icon on Initialize about nebula HOT 1 CLOSED

Got Runtime log

[10:28:50] Runtime in buttons.dm,54: Cannot read null.current_build_mode
proc name: Initialize (/obj/effect/bmode/mode/Initialize)
usr: Jera Johnson (/mob/observer/ghost) ([0x3000001]) (the floor) (24,18,1) (/turf/simulated/floor/tiled)
usr.loc: The floor (/turf/simulated/floor/tiled) ([0x1000347]) (24,18,1) (/area/constructionsite)
src: the mode (/obj/effect/bmode/mode)
src.loc: null
call stack:
the mode (/obj/effect/bmode/mode): Initialize(0)
Atoms (/datum/controller/subsystem/atoms): InitAtom(the mode (/obj/effect/bmode/mode), /list (/list))
the mode (/obj/effect/bmode/mode): New(0)
/datum/click_handler/build_mod... (/datum/click_handler/build_mode): New(Jera Johnson (/mob/observer/ghost))
Jera Johnson (/mob/observer/ghost): PushClickHandler(/datum/click_handler/build_mod... (/datum/click_handler/build_mode))

from nebula.