If the Xbox app default install location is set to a drive other than C, running MCL fails with the following:

In the log then appears

[Info: 2021-11-02 13:22:14.7066373: PistonUpdate.cpp(767)] CopyFile(C:\...\8f157cc1ab1c18bf47305543b149604797cd6587, C:\...\cef.pak)
[Error: 2021-11-02 13:22:14.7174269: PistonUpdate.cpp(810)] Update failed for: /:\...\cef.pak, Error: The system cannot move the file to a different disk drive.
[Error: 2021-11-02 13:22:15.9777401: main.cpp(119)] Updating common component failed!

This can be resolved by changing the default installation location to the C drive.