You don’t have permission to save in this location
Many Windows 11/10 users have been facing this issue. If you too see this error message, create a system restore point and then do the following: Restart your Windows 11/10 computer and see if it has helped. Go here if you cannot save files in OneDrive folder after upgrading to Windows 11/10. These posts may also help you:
How to take full Ownership of Files & Folders in WindowsHow to change File and Folder permissions in Windows.