Based on the error, I'd say it might be an enchant on your gear that isn't working properly. I could be wrong, but I've had it happen before, though mine was an error that made fights not load properly. Check for any gear with bonuses and try removing them. With any luck, that might help. If not, then you'll need to wait for a response from the creator.
Viewing post in Old Bug Report Thread
I sold all my enchanted gear but with no luck :( I did see a new error on the console tho, I made another playthrough in Winborn which was going well until Chloe joined my household (didn't tamper with her antidote):
SCRIPT ERROR: person.cour_set: Invalid get index 'person' (on base: 'Dictionary').
At: res://globals.gdc:930
SCRIPT ERROR: person.calculateluxury: Invalid get index 'person' (on base: 'Dictionary').
At: res://globals.gdc:1190
SCRIPT ERROR: _on_end_pressed: Invalid operands 'int' and 'Nil' in operator '<'.
At: res://files/scripts/Mansion.gdc:795