OneDrive Sync Troubleshooting: Connection Refused Checklist - Fix Chrome Invalid Profile Configuration on Mac-Chrome Profile Access Denied: Post-Update Fix Guide
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.