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Fix npm run build Failure from Missing Env Variables - How to Resolve Cloudflare 521 After Server Update-Troubleshooting Empty Source Control Panel in VS Code

2026-07-28 05:40:22
Fix npm run build Failure from Missing Env Variables - How to Resolve Cloudflare 521 After Server Update-Troubleshooting Empty Source Control Panel in VS Code

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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