Microsoft has announced workarounds for error code 0xc1900101 that has been affecting recent Windows 11 Insider Preview Builds installations. For some reason, the error code 0xc1900101 appears to be linked to SecretFilterAP.dll, although Microsoft lists other solutions too.
https://www.notebookcheck.net/Windows-11-Microsoft-confirms-update-problem-with-recent-Insider-Preview-Build.614683.0.html