I've not needed Mod Fixer since Patch 1. I don't think removing it will fix your problem but maybe worth a long shot?
"-trying the mod manager fixer" What is this?
Which mod manager do you use?
One of the moderators posted this the other day. Might be worth a try though it will remove all your mods from the game. If it gets your game going you could always try re-adding them later.
https://forums.larian.com/ubbthreads.php?ubb=showflat&Number=894261#Post894261
