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How to Fix Cloudflare 521 Error Due to Proxy Issues - How to Set Timeouts in Python Requests-Fix Git 'index.lock' File Exists Error in IntelliJ

Updated 2026-07-28 09:24:57developer-tools
How to Fix Cloudflare 521 Error Due to Proxy Issues - How to Set Timeouts in Python Requests-Fix Git 'index.lock' File Exists Error in IntelliJ
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.