First, when trying to start a new game with this mod installed, getting this error message before the game even loads:

__Kux-Factorium__/control.lua:4: Path __Kux-GuiLib__/lib/init.lua does not match any enabled mod.

Also, in dependencies, Kux-CoreLib is listed twice. Once for Version >= 3.0.0 and once for >= 3.17.0. GuiLib is not listed at all, not sure if this is an oversight? Did you intend to put your Gui Library mod there which is currently not listed at all in dependencies?

But even with the Gui Library mod installed, when creating a new save the game crashes immediately upon loading into the map with:

Error while running event Kux-Factorium::on_nth_tick(1)
__Kux-CoreLib__/lib/TranslationService.lua:160: attempt to index field '?' (a nil value)
stack traceback:
__Kux-CoreLib__/lib/TranslationService.lua:160: in function 'request_internal'
__Kux-CoreLib__/lib/TranslationService.lua:191: in function 'fnc'
__Kux-CoreLib__/lib/EventDistributor.lua:155: in function <__Kux-CoreLib__/lib/EventDistributor.lua:151>

This is only with Base mod and the dependency mods (plus Gui Lib) enabled.
Mod version 3.0.12, factorio version 2.0.49

thanks, fixed, Yeah, the new lib still has some teething problems ;-)

Thanks for the quick fix!

New bug:
The mod loads now but the mod window does not close when you press the X. Some elements of the window close like the top bar with the mod name and options, but the rest stays on the screen.

after loading a game? or immediately after opening?
i have a hunch, i am working on it.
workaround: open th UI without closing, will refresh the broken UI cache

This is when having loaded a game and trying to use the mod. And yes, as you say opening the window again refreshes it, but you can never get the window to fully disappear again after you've opened it once without reloading the save. At least i couldn't figure out a way.

open a new winddo will destroy the old one and if you close the new one it will disapear
please update to Kux-GuiLib 3.0.2