Fix Port Already Allocated Error in Windows Server 2019 Activation - Fix Microsoft Store Blank Screen When Opening an App-Fix OneDrive 404 Not Found & Permission Denied Errors
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.