必应池
Home / developer-tools / Fix 'Port Already Allocated' Error in Docker Compose on Mac - Resolve Git SSL Error 'unable to get local issuer certificate'-Cloudflare 521 Error After Server Restart: Fixes

Fix 'Port Already Allocated' Error in Docker Compose on Mac - Resolve Git SSL Error 'unable to get local issuer certificate'-Cloudflare 521 Error After Server Restart: Fixes

Updated 2026-07-28 15:53:59developer-tools
Fix 'Port Already Allocated' Error in Docker Compose on Mac - Resolve Git SSL Error 'unable to get local issuer certificate'-Cloudflare 521 Error After Server Restart: Fixes
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.