Reader app - Can't update through Store

My Reader app in the store can't update. I keep getting the error 0x803F8001

to fixed this you have to use Dism command to cleanup image online

Dism /Online /Cleanup-Image /ScanHealth


Dism /Online /Cleanup-Image /CheckHealth


Dism /Online /Cleanup-Image /RestoreHealth

also use this command

SFC/scannow

if you still have this error

you have to mount your ISO and then mount the windows in install.wim

Dism /mount-wim /wimfile:X:\source2\install.wim /index:1 /mountdir:X:\mount

index:1 for windows 10 if home index:2

DISM /Online /Cleanup-Image /RestoreHealth /source:WIM:X:\Sources\Install.wim:1 /LimitAccess

after that
dism /unmount-Wim /MountDir:X:\mount /discard


Dism /Online /Cleanup-Image /RestoreHealth