Game crashes when friend joins game/his crashes when I join

[Matex]

Modded game, here is our loadorder:
Abysm
Increased Merchant Inventory
gems are consumables
respec/restat potion
addon to additional classes
specialized blacksmith
1600-slot shared stash
torchlight overhaul project UIMC UI
synergieshighloot
synergies

we aren't using any class that crashes a game, also from what I've found out the overhaul project mod is the reason for the crash.
My question is, any way to bypass it? If not, does anyone know the mods inside it that crash the game (since we kind of like the game with those mods, would suck to just take them away)/a mod that fixes the issue?

[otf.]

delete him in torchlight friend list
may be will help