The file Dism.psm1
from the package Microsoft-Windows-Client-Features-Package-AutoMerged-base
is corrupted.
I've extracted the package into a CAB. Download it, extract the CAB and point to it as source in the DISM command
DISM /Online /Cleanup-Image /RestoreHealth /source:C:\Microsoft-Windows-Client-Features-Package-AutoMerged-base~31bf3856ad364e35~amd64~~6.3.9600.16384