When I run Script-IDE, I often see this error, both at startup as well as on script reloads or during runtime in general
Godot Engine v4.1.2.stable.official (c) 2007-present Juan Linietsky, Ariel Manzur & Godot Contributors.
--- Debug adapter server started ---
--- GDScript language server started ---
Timer was not added to the SceneTree. Either add it or set autostart to true.
Parent node is busy setting up children, `add_child()` failed. Consider using `add_child.call_deferred(child)` instead.
scene/main/window.cpp:1565 - Condition "!is_inside_tree()" is true.
The timer issue remains, nothing in Script-IDE's code seems to directly reference timers, but I think it may be something it does internally. There is no such error message when I remove the plugin.