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Cloudflare 521 Error: Server Timeout – Causes and Fixes - Resolve Chrome's Repeated Sign In Prompt for Sync-Fix Git 'index.lock' File Exists Error in SourceTree

2026-07-28 19:24:51
Cloudflare 521 Error: Server Timeout – Causes and Fixes - Resolve Chrome's Repeated Sign In Prompt for Sync-Fix Git 'index.lock' File Exists Error in SourceTree

Result check

  • Keep one change per test run so you know which step helped.
  • Undo temporary changes after the issue is confirmed.

Next references

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