I have a crash when i try to reload a game:

52.543 Error AppManagerStates.cpp:1455: Le mod Crafting Combinator (0.15.2) a engendré une erreur non récupérable.
Merci d'informer l'auteur de cette erreur.

Error while running event crafting_combinator::on_load()
crafting_combinator/script/signals.lua:47: attempt to index field 'signals' (a nil value)
stack traceback:
crafting_combinator/script/signals.lua:47: in function 'on_load'
crafting_combinator/control.lua:26: in function <crafting_combinator/control.lua:23>

I can't see how that could happen... How exactly did you add the mod to the save?

Well I think I may have found the issue, tho I'm not completely sure. I managed to crash it when loading a 0.14 save with 0.15.2 and there were some uninitialized new things being called for whatever reason. I'll patch this for the next version, so let me know if you still have the issue after that.

I have tried the last version and it worked well.
Thank you

i had started a new map in 0.18.x and played without problems. after a short break of maybe 2 weeks, i updated to 0.18.19 and also updated all mods to their newest versions. now i get this error when i try to continue my last game (some autosave) ...

The mod Crafting Combinator (0.15.3) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event crafting_combinator::on_configuration_changed
crafting_combinator/migrations/0.15.2.lua:4: attempt to index field 'signals' (a nil value)
stack traceback:
crafting_combinator/migrations/0.15.2.lua:4: in function '_apply'
crafting_combinator/script/bootstrap.lua:38: in function 'apply'
crafting_combinator/script/bootstrap.lua:52: in function 'late_migrations'
crafting_combinator/control.lua:52: in function <crafting_combinator/control.lua:51>

Which version of the mod was in the save before? I tried a few suspect ones, but none crashed.
I could patch this with a nil check, but that would be fixing the symptoms rather than the issue itself, which I'd rather not do...