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Chrome Sync Not Working on School Chromebook: Fixes - Troubleshoot Nginx Upstream Connection Refused-Resolve Chrome Invalid Authority SSL Error After Reinstall

2026-07-28 23:02:14
Chrome Sync Not Working on School Chromebook: Fixes - Troubleshoot Nginx Upstream Connection Refused-Resolve Chrome Invalid Authority SSL Error After Reinstall

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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