1. Manually Sign in from Visual Studio Settings Open Visual Studio 2022. Go to Tools → Options → GitHub Copilot. Look for an option to Sign in manually or Reauthenticate. If available, select it and try signing in again.
2. Ensure Visual Studio is Updated Open Visual Studio Installer. Check for updates and install any pending ones. Restart Visual Studio and try signing in again.
3. Use GitHub Authentication Token If the sign-in isn't working via the browser flow, try using a Personal Access Token (PAT):

Go to GitHub → Settings → Developer settings → Personal access tokens. Generate a new token with read and write permissions. Use this token to authenticate GitHub Copilot in Visual Studio. 4. Run Visual Studio as Administrator Close Visual Studio. Right-click Visual Studio 2022 and select Run as Administrator. Try signing in again. 5. Check for Conflicting Extensions Disable other GitHub extensions (like GitHub for Visual Studio). Restart Visual Studio and attempt to sign in again.

6. Check GitHub Copilot Service Status Sometimes, GitHub Copilot might be experiencing downtime. Check: https://www.githubstatus.com/