Hey @Mr-Panda1 !
Sorry for the inconvenience, it's a known issue that we are actively working on. If it's fine by you, can you send logs with your SteamID to firstname.lastname@example.org ?
(Should be available right here: %LOCALAPPDATA%\Insurgency\Saved\Logs)
Thank you for reporting this issue and have a great day.
If you are running Windows 10, here is what fixed it for me:
Go Start, settings, network and connections.
At the bottom is reset network, click that.
A popup appears saying " your computer will restart in 5 mins"
Twice this has happened to me and both times this fixed it.
Hope it helps.