Microsoft issues emergency patch after breaking OneDrive with Windows 10 update
Windows 10 users who installed Patch Tuesday updates this month have reported that OneDrive and OneDrive for Business is broken.
The problem relates to the KB5018410 update and others released after it. People affected by the issue report app crashes, being unable to sign out of OneDrive, problems with syncing, and various other symptoms. Microsoft acknowledged the problem fairly quickly and has now issued an emergency fix (the KB5020953 update).