What Causes CS:GO Failed to Connect to Match? The error is quite a broad one but you can always gather a couple of problems which happen to almost everyone: Broken or missing game files. Windows Firewall blocking the game from running.

Why cant I connect to the CS: GO servers?

CS: GO server errors can be due to Windows Defender Firewall blocking the game connecting with the server. Click the Turn Windows Defender Firewall on or off link. Select the Turn off Windows Defender Firewall options, and click the OK button.