That is an entirely different crash than what OP reported though. From what I know, world serialization crashes usually happens when your save is corrupted or a modded actor is outdated in the area your character was when you logged off. First of all, make a complete backup of your Saved directory so that you have an unmodified fallback point. Try to rename the following folder (or wherever you installed the game): C:\Program Files (x86)\Steam\steamapps\common\ARK\ShooterGame\Saved\SavedArks