The pregnancy error persists in different versions of the game (regular and additional, with and without mods), I replayed several times with the renamed folder, following your instructions ...
**SCRIPT ERROR**: Invalid get index 'I117' (on base: 'Dictionary').
At: res://files/scripts/items.gd:1898:unequipitem() - Invalid get index 'I117' (on base: 'Dictionary').
Aric's Expansion v0.97
**SCRIPT ERROR**: Invalid get index 'back' (on base: 'Array'). Did you mean '.back()' or funcref(obj, "back") ?
At: user://mods/AricsExpansion/scripts/aricsexpansion/expansion.gd:1772:dailyPregnancy() - Invalid get index 'back' (on base: 'Array'). Did you mean '.back()' or funcref(obj, "back") ?
**SCRIPT ERROR**: Invalid get index 'back' (on base: 'Array'). Did you mean '.back()' or funcref(obj, "back") ?
At: user://mods/AricsExpansion/scripts/aricsexpansion/expansion.gd:1772:dailyPregnancy() - Invalid get index 'back' (on base: 'Array'). Did you mean '.back()' or funcref(obj, "back") ?
**SCRIPT ERROR**: Invalid get index 'back' (on base: 'Array'). Did you mean '.back()' or funcref(obj, "back") ?
At: user://mods/AricsExpansion/scripts/aricsexpansion/expansion.gd:1772:dailyPregnancy() - Invalid get index 'back' (on base: 'Array'). Did you mean '.back()' or funcref(obj, "back") ?
**SCRIPT ERROR**: Invalid get index 'skin_cov' (on base: 'Reference (person.gd)').
At: res://files/scripts/characters/description.gd:402:getBabyDescription() - Invalid get index 'skin_cov' (on base: 'Reference (person.gd)').
**SCRIPT ERROR**: Invalid operands 'String' and 'Nil' in operator '+'.
At: res://files/scripts/Mansion.gd:3104:childbirth() - Invalid operands 'String' and 'Nil' in operator '+'.