Error :50 dism doesn't support servicing windows PE with the /online option

From the recovery console command prompt, enter the following command:

dism.exe /image:C:\ /cleanup-image /revertpendingactions

After that, reboot your machine into Safe Mode. In Safe Mode, open an elevated command prompted and issue:

SFC/ scannow

command and that should run. `

https://answers.microsoft.com/en-us/windows/forum/windows8_1-update/error-50-dism-doesnt-support-servicing-windows-pe/63d72447-ee95-4ebe-a4bc-1c6053140309