Fix 'Permission Denied' When Deleting Files in VS Code - Cloudflare 521 Error After Server Restart: Fixes-Fix 'Secure Connection Failed' in Firefox Mobile

Updated 2026-07-28 10:50:06backup-recovery
Fix 'Permission Denied' When Deleting Files in VS Code - Cloudflare 521 Error After Server Restart: Fixes-Fix 'Secure Connection Failed' in Firefox Mobile
Before changing system settings, save your work and note the exact error text so you can compare results after each step.

Extra verification checklist

  • Restart the affected app after changing permissions or configuration files.
  • Test the same workflow in a clean browser profile or a temporary user account.
  • Compare the result on another network if the error may be connection related.