Home / office-tools / How to Clear DNS Cache to Fix ERR_NAME_NOT_RESOLVED - How to Resolve npm ERR! enoent Missing package.json-Cloudflare 521 Error on Nginx: How to Fix

How to Clear DNS Cache to Fix ERR_NAME_NOT_RESOLVED - How to Resolve npm ERR! enoent Missing package.json-Cloudflare 521 Error on Nginx: How to Fix

Updated 2026-07-28 09:18:42office-tools

How to Clear DNS Cache to Fix ERR_NAME_NOT_RESOLVED - How to Resolve npm ERR! enoent Missing package.json-Cloudflare 521 Error on Nginx: How to Fix

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.