It's likely that the System Reserved Partition is not large enough. It could also be due to file system errors. This article will give you ways to deal with either of those issues. Backup your user data/files prior to any fixes and prior to major upgrades. 
I cleared the 100% Disk 0 partition like solution present on other forums but still having this error while updating to windows 11 22H2. I don't understand what's wrong since disk partition is completely free (100MB in size).
G15 5515, reserved partition error