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Fix Docker Compose Environment Variable Substitution Failed - Cloudflare Error 521: Quick Fix Guide-Resolve Git SSL Certificate Problem on Windows, macOS, Linux

2026-07-28 14:48:15
Fix Docker Compose Environment Variable Substitution Failed - Cloudflare Error 521: Quick Fix Guide-Resolve Git SSL Certificate Problem on Windows, macOS, Linux

Result check

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

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