And i've read the help thread dedicated to this error, but the thing is that the Shaders_client.zip file is missing. I've read on some Forgotten Hope 2 forum that this file may disapear if you don't exit the game properly and yeah i'm serious there's no such file on my PC.
I think FH2 might have caused it. It started happening after the FH2 crashed and it would not start again, then I tried to play some PR and boom I get kicked out of every single server...