game crashing when trying to play with friends

[musser233]

ok guys i need help. when iam trying to play reflex with one of my friends and once at the moment he joins my game crashes and sends me to the desktop. no matter if this is a private or public. i can join other people just fine but him it just crashes. i can be in a public before him and he'll join and my game will crash. ive tried everything deleting and re installing everything possible and it still happens.

[Darkslides19]

Any skins or other mods installed?