siwyi

No, I'm not using any antivirus. The system is completely clean, just some win 7 updates and steam. Nothing else.

As I said before, antivirus and firewall don't block anything. All betas are opted out. "All files successfully validated".

I can't play since new patch, I have that "Cannot validate game version. Would you like to try again?" error. I reinstalled both game and multiplayer but it doesn't work. Before that patch everything worked fine. I have the latest ETS patch and the latest multiplayer launcher. Everything is up-to-date! I'm sure antivirus and firewall is not blocking anything. Running with administrator privileges won't help.

I have the same problem. I reinstalled the game and ets2mp but still getting that prompt "Cannot validate game version". Win7 x64 here and i could play 2 days ago on multiplayer. No firewall or antivirus blocking. Nothing has changed in my system since then. One of my friends is having the same issue on Win10 x64.