Co-op failure when loading in

Tried loading co-op multiple times and game keeps crashing

On EU, by chance?

I’ve actually been encountering such issues with the game not only at EU, but US too, after using Windows 10 for several weeks without turning it off.
My guess is that since I have a non-ECC memory, it can get corrupted data over long use. I tend to see some players’ avatars ingame out of place, or even a big blue square instead of player’s avatar, and then sometime later the game just crashes either midgame or during loading the game.
So, my advice may sound trivial, but try rebooting at first. If that doesn’t help, check if your memory or CPU are being overloaded and free up resources by closing the other running programs if possible.