GitHub Copilot can't connect to your company's network, so don't just reinstall the plugin. The more likely problem is that a VPN, HTTP proxy, firewall, or self-visa is blocking Copilot's connection to GitHub services. Using commands to test first, and then letting IT read the logs, is more effective than blindly changing editors.
Test the Copilot endpoint first
The official GitHub documentation recommends testing the connection with 'curl'. You can first request the ping address of the Copilot agent to see if it returns HTTP 200. If it's a Copilot Chat issue, also check the ping address of the Chat API.
If the ordinary network can be connected and the company network is not, it is basically not an account problem, but a network policy problem.
What do you think about the proxy problem?
If your company requires a proxy, make sure that both the editor and Copilot can use the proxy. The GitHub documentation also reminds that the proxy methods supported by the editor do not necessarily mean that the Copilot extension is fully supported.
Common manifestations include 'ETIMEDOUT', 'ECONNRESET', unable to connect to the server, and failure to activate the extension. When encountering these, first sort out the proxy address, authentication method, system certificate and editor log.
Don't ignore certificate issues
If the company agent does HTTPS checks, it may replace the certificate, causing Copilot to fail to report certificate validation. Temporary closure of strict certificate checking may work, but this has security risks and is not recommended as a long-term solution.
More reliably, IT can install the necessary certificates into the system trust base and release relevant domains, ports, and protocols according to GitHub's Copilot allowlist.
Troubleshooting Sequence
The first step is to confirm that your GitHub account and Copilot authorization are normal. The second step is to change the hotspot test of the mobile phone. The third step is to measure the endpoint with curl under the corporate network. Step 4: Check the Copilot logs in the IDE. The fifth step is to hand over the error code, time, network environment, and proxy configuration to IT.
Conclusion: If Copilot cannot connect to the company's network, the focus is not on "AI completion is broken", but on first proving where the link is broken. Accounts, plugins, proxies, certificates, and firewalls are checked separately, and the resolution speed will be much faster.
