Sorry for bothering you with something wich was my own fault then.
Don't know if it is, or not. If you're getting these errors after selecting the protagonist, use the console and enter h.skills = []
If it's Bernie, then, if she's NOT possessing a corpse:
ber.skills = [soulshriek, magicmissile, spiritualguardian, rejuvenatingwhispers, heal, mendingprayers, pacifistresolve, possesscorpse]
Or if she IS possessing a corpse:
ber.skills = [soulshriek, anansicurse, hasteofthedamned, manaexplosion, masochism, heal, mana_shield, possesscorpse]
Protagonist learned a lot of skills. I gave him skillpoints to test out the various skills of the game, maybe what triggered the error. But he works just fine.
Bernie prior to possessing a corpse worked just fine. I'm not sure about the skills she had though, i remember seeing mostly holy stuff wich surprised me given her supposed necromancer's background
Bernie bugged after i collected the corpse on the beach. The game showed me the message error i showed you every time i tried to have her fight from that point on. I didn't change anything about her though. So long as i pass turn instead of having Bernie fight the game doesn't have issue. It doesn't make much of a difference anyway with my MC being Lvl 18 at that point and her being low level when first entering the underworld.
Use ber.tags['Ghost']['PossessedSkills'].pop() and one of the previous commands to fix her. Alternatively, wait for the next update. Idk. what went wrong, but I'll try to find out.
As for her having holy skills, the difference isn't that big between healing and necromancy in the game's setting. Healers don't play with the soul and corpses in a bad way, but can. Hence you can use holy spells on the undead (healing, regeneration and so on).