How to Fix Cloudflare 521 Error (Port 443 Blocked) - Pip Externally Managed Error: Setup Python venv Correctly-Fix net::ERR_CERT_AUTHORITY_INVALID on Chrome in Linux Terminal
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.