Fix OneDrive 504 Gateway Timeout: Setup & Troubleshooting Guide - OneDrive Sync Error Step-by-Step Fix-Group Policy Causing Windows Defender Conflict? Fix It
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.