Windows – DISM error 87 the add-package option is unknown

The issue is resolved by using newer dism version and running it in cmd directly from WAIK folder:

C:\Program Files (x86)\Windows Kits\10\Assessment and Deployment Kit\Deployment Tools\amd64\DISM>

This limitation is due to boot wims based on newer WinPE versions require newest dism.

the workaround could not be simpler:

1. delete folder C:\Windows\System32\Tasks\Microsoft\XblGameSave
2. delete registry key: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\WindowsNT\CurrentVersion\Schedule\TaskCache\Tree\Microsoft\XblGameSave
3. Re-run the update

-> link to the solution