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Fix Git Authentication Failed in VS Code on Mac - Resolve 'index.lock File Exists' in SourceTree-How to Fix Cloudflare 521 Error Due to Proxy Issues

Updated 2026-07-28 14:42:43windows-fixes
Fix Git Authentication Failed in VS Code on Mac - Resolve 'index.lock File Exists' in SourceTree-How to Fix Cloudflare 521 Error Due to Proxy Issues
Likely symptom
Likely cause
Safe rollback

Verification route

  • Repeat the original action, not only a simplified test case.
  • Restart the app or reload the service after configuration changes.