The following information may or may not be useful regarding the 0xC1900101 error. On one of my attempts to upgrade my windows 10 it failed with the same error, but after the roll back and subsequent re boot I had the following message on screen.
We couldn't install windows 11. We set your pc back to the way it was right before you started installing windows 11.
0XC1900101 - 0X4000D
The installation failed in the second _Boot phase with an error during Migrate_Data operation.
I hope this may be of use to someone in figuring out what is causing this.