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.

Why is CSGO ping so high?

Aside from a slow internet connection, there are other things that could be causing high ping, such as your PC settings, the server youre choosing to play CS:GO on, or bandwidth hogging applications. An old network adapter, less storage, and memory along with a GPU can all lead to high ping and lag issues.