Fix 'Outlook Data File Cannot Be Accessed' Error in Outlook 365 - How to Fix Node Version Mismatch in a React Project-Resolving Go Module Proxy Checksum Mismatches

Updated 2026-06-13 12:16:55backup-recovery
Fix 'Outlook Data File Cannot Be Accessed' Error in Outlook 365 - How to Fix Node Version Mismatch in a React Project-Resolving Go Module Proxy Checksum Mismatches
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.