Plutonium

There's no harm in doing that. Majority of the servers use a third party server administration tool that disallows VPNs, but you should be fine as long as you use it only to get into the main menu, then disable the VPN after that.

Maverick_ thank you

It also happened with me but when I restarted my pc it was ok.

Try deleting %localappdata%/Plutonium and run the launcher again.