Bug/Issue Problem going into multiplayer

Hi,

I bought this game two or three days ago and i worked perfectly fine until today. The game actually sends me an error message when I play in multiplayer mode, after a few minutes.
"Connection to the server interrupted"



Here is what I tried :

- Restarting the game
- Starting the game with OpenGL
- Running Steam as administrator
- Restarting my computer
- Restarting my rooter

My connection isn't bad at all as i can play any game with less than 50 ms.

Thank you in advance