The Windows installation tool will do the same as the repair & more so imo this is all you require - media creation tool & create USB.
For imaging/backup purposes:
Windows backup & maybe in the future file history are being deprecated & will eventually be removed, what you’re experiencing may be related to that.
https://docs.microsoft.com/en-us/windows/deskto...
Microsoft recommend using third party software:
“System Image Backup (SIB) Solution
We recommend that users use full-disk backup solutions from other vendors.”
https://support.microsoft.com/en-us/help/403482...
I recommend moving to third party imaging software now before it is removed permanently if you prefer backing up your PC rather than using File history.
Many users recommend Macrium Reflect free:
https://www.macrium.com/reflectfree
Note: This is a non-Microsoft website. The page appears to be providing accurate, safe information. Watch out for ads on the site that may advertise products frequently classified as a PUP (Potentially Unwanted Products). Thoroughly research any product advertised on the site before you decide to download and install it.