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Fix Chrome Profile Authentication Failed & Sync Not Working - Windows Terminal Settings Backup and Restore Guide-Troubleshoot Windows Defender 504 Gateway Timeout

Updated 2026-06-14 05:37:39backup-recovery
Fix Chrome Profile Authentication Failed & Sync Not Working - Windows Terminal Settings Backup and Restore Guide-Troubleshoot Windows Defender 504 Gateway Timeout
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.

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