Karte kann nicht gespeichert werden: Die Mod Spell Pack (0.20.24) hat einen Fehler verursacht, der nicht behoben werden kann.
Bitte informiere den Autor der Mod über diesen Fehler.

Error while running event m-spell-pack::on_save()
Cannot serialise lua functions

I'm confused how it happened.

So, I updated, BUT it'll throw another error, which I need to see it in order to properly investigate the bug and fix issues.

2719.372 Error ParallelScenarioSaver.cpp:158: Saving scenario failed: The mod Spell Pack (0.20.27) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event m-spell-pack::on_save()
Cannot serialise lua functions
2719.381 Error Util.cpp:81: Attempting to create notice box in headless mode. Message: 'Cannot save map: The mod Spell Pack (0.20.27) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event m-spell-pack::on_save()
Cannot serialise lua functions'

------------- Error -------------
Attempting to create notice box in headless mode. Message: 'Cannot save map: The mod Spell Pack (0.20.27) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event m-spell-pack::on_save()
Cannot serialise lua functions'

Yeah, it has even more issues.