GitHub Copilot doesn't autocomplete, so don't rush to reinstall the editor. The most effective order of troubleshooting is: look at the account authorization, then check the editor plug-in status, then check whether the file is restricted by policy, and finally check the network, proxy, and logs. Many of the problems are not that the model is broken, but that Copilot doesn't get an available token at all or that the current file doesn't allow suggestions.
Check if it's an account issue
If Copilot Chat is also not available, first check whether GitHub is logged in to the correct account, subscription, or organizational authorization. Business or school accounts especially depend on whether the organization administrator has assigned you a Copilot seat.
If Chat works, only inline completions don't appear, and the problem is more likely to be with editor settings, language mode, or the current file. Open the Copilot status page in VS Code, JetBrains, or Visual Studio and verify that the plugin is not disabled or stuck in a failed login state.
Look at the current file again
Some organizations restrict Copilot from providing recommendations for specific files, especially public code matching policies, repository policies, protected files, oversized files, or unsupported file types. You can create a new plain '.js', '.py', or '.md' file and write a few lines of comments to try it. If a new file is complete, it is not a global failure, but a current file or project policy issue.
Also check if the editor has turned off inline suggestions. Sometimes users think that Copilot is not responding, but in fact, inline suggestions are overwritten by VS Code settings or other completion plugins.
How to check the network and proxies
Corporate network, VPN, proxy, certificate interception affects Copilot connections to GitHub APIs. The sign may be that the login is successful but the recommendation never comes, or the status bar repeatedly spins in circles. At this point, it is more useful to check the IDE logs as recommended than repeatedly restarting.
If you're on a corporate network, give the error, time, IDE, plugin version, and logs directly to your administrator to check GitHub Copilot's domain, proxy, and firewall rules. Don't just say "Copilot is broken," it's hard to locate.
Fastest recovery method
Follow these steps: Log out of your GitHub account and log in again. update the Copilot extension and editor; Confirm that the current file language mode is correct; temporarily disable the collision completion plugin; Change to a simple file test; Finally, check the Copilot logs.
If only a certain warehouse is not completed, focus on checking organizational policies and file rules. If all repositories are not complete, focus on checking the account, network, and extension status.
