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Fix 'Windows Cannot Access Shared Folder' in Workgroup - Docker Network 502 Error Troubleshooting-Fix Nginx 'upstream connection refused' When Talking to PHP-FPM

Updated 2026-07-28 10:30:53developer-tools
Fix 'Windows Cannot Access Shared Folder' in Workgroup - Docker Network 502 Error Troubleshooting-Fix Nginx 'upstream connection refused' When Talking to PHP-FPM
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.