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Fix Docker Build Error: 'failed to solve: manifest not found' - Windows Defender Service Unavailable Error Fix-Resolve Cloudflare 521 on Your WordPress Site

Updated 2026-06-13 13:08:44office-tools
Fix Docker Build Error: 'failed to solve: manifest not found' - Windows Defender Service Unavailable Error Fix-Resolve Cloudflare 521 on Your WordPress Site
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.