Fix npm run build Failed After Git Pull - How to Resolve Cloudflare 521 After Server Update-Troubleshooting Chrome Extensions After Browser Update

Updated 2026-07-28 20:00:19browser-issues

Fix npm run build Failed After Git Pull - How to Resolve Cloudflare 521 After Server Update-Troubleshooting Chrome Extensions After Browser Update

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.