UI ERROR 66495

Heyho,
I just wanted to play a match in Black cocks 2 and when I click on "create a class" or when I'm loading a map the game crashes and the console say "Fatal Error! UI ERROR 66495" I googled it but there is no solution.
Yesterday evening i used the "BO2-V37/V40-Combat & Weapon Stats/One Hit Kill/Camos & Sights Unlocker/Error Fixer"
The game worked. But I saw that the camo of the KAP 40 was not unlocked so I unlocked it. After that the error came.
I verified the game cache and all the options there are but nothing works.

Does anyone have a solution?

greetings

i never heard of
"Black Chicken 2"
Sorry.