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Fix npm run build Failure from Missing Env Variables - How to Fix Cloudflare 521 Error (Port 443 Blocked)-Fix VSCode IntelliSense Not Working with TypeScript

2026-07-28 07:04:48
Fix npm run build Failure from Missing Env Variables - How to Fix Cloudflare 521 Error (Port 443 Blocked)-Fix VSCode IntelliSense Not Working with TypeScript

Result check

  • Keep one change per test run so you know which step helped.
  • Undo temporary changes after the issue is confirmed.

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