Unkown object type serialized by server FIX (maybe)

This is what worked for me:
1 - Run as admin
2 - If you cant login try a different character (used a end game one), then log back to the new character
3 - Change your item filter, Im using the semi strict from filterblade

Went back to town a couple os times and havent crashed ever since

forgot to post an update earlier, finished act 1 and half of act 2 without any issues afterwards