Table of Contents
GitHub Copilot Not Suggesting Code: 12 Fixes in 2026
Quick Answer
GitHub Copilot usually stops working due to authentication, subscription, network, or editor extension issues. 90% of cases fix with sign-out/sign-in and extension reload.
- Confirm subscription active at github.com/settings/copilot
- Sign out of Copilot in editor, sign back in
- Disable conflicting extensions (other AI autocompletes)
Why This Happens
Copilot requires: active Copilot subscription (Free, Pro, Business, or Enterprise), signed-in GitHub account, Copilot extension installed, network access to api.githubcopilot.com (port 443), and no org policy blocking it. Common breakages: expired token, revoked seat (Business/Enterprise), conflicting extension, firewall blocking the API.
Step-by-Step Fixes
Step 1: Check subscription status
github.com/settings/copilot — confirm active plan. Free: 2K completions/mo. Pro: unlimited.
Step 2: Check Copilot status
githubstatus.com — look for "Copilot" row.
Step 3: Sign out and back in (VS Code)
Cmd/Ctrl + Shift + P → GitHub Copilot: Sign Out → then Sign In.
Step 4: Reload the editor
Cmd/Ctrl + Shift + P → Developer: Reload Window.
Step 5: Verify extension is enabled
Extensions sidebar → GitHub Copilot → ensure Enabled. Update if outdated.
Step 6: Check for conflicting extensions
Disable: Tabnine, Codeium, IntelliCode, AWS CodeWhisperer, AI Genie. Only one AI autocomplete should be active.
Step 7: Check file type support
Copilot supports the following languages:
| Language | Supported |
|---|---|
| JavaScript | Yes |
| TypeScript | Yes |
| Python | Yes |
| Java | Yes |
| C# | Yes |
| C++ | Yes |
| Go | Yes |
| Ruby | Yes |
| PHP | Yes |
| Swift | Yes |
| Kotlin | Yes |
| Rust | Yes |
| Scala | Yes |
| HTML/CSS | Yes |
| SQL | Yes |
| Bash/Shell | Yes |
| PowerShell | Yes |
| Dockerfile | Yes |
| JSON | Yes |
| YAML | Yes |
| Markdown | Yes |
| Plain text | No |
| XML | Limited |
Step 8: Check "Inline Suggestions" setting
Settings → Editor → Inline Suggestions → Enabled. In VS Code: editor.inlineSuggest.enabled: true.
Step 9: Network / firewall
Copilot needs HTTPS to *.githubcopilot.com, copilot-proxy.githubusercontent.com. Corporate firewalls often block — request allowlist.
Step 10: For JetBrains IDEs
Settings → Tools → GitHub Copilot → Log out / Log in. Restart IDE.
Step 11: Check org policy (Business/Enterprise)
If your org revoked your seat or restricted repo/languages, Copilot silently disables. Contact admin.
Step 12: Reset extension
Uninstall Copilot extension → restart editor → reinstall → sign in.
When to Contact Support
- Paid Pro subscription but no suggestions after 24 hours of troubleshooting
- Enterprise seat assigned but "not eligible" error
- Persistent
403errors despite active subscription
Support: support.github.com or github.com/copilot/support.
Prevention Tips
- Keep Copilot extension auto-updated
- Don't install competing AI autocompletes
- For Business: maintain clear seat assignment process
- Monitor githubstatus.com via RSS for outages
Conclusion
Copilot issues are usually auth, subscription, or extension conflicts — all quickly fixable. For a multi-model coding assistant with Copilot-like inline suggestions plus Claude/GPT chat, try Assisters AI.