Hello,
As indicated in the initial response in the post you referenced, please include the target directory with the DIR= flag.
Secondly, the error Failed to expand shell folder userdesktop seems to be a generic error seen by many installers.
Please see if any of the suggestions on this webpage are also helpful to you
https://www.reddit.com/r/SCCM/comments/kvsfvr/failed_to_expand_shell_folder_constant/?rdt=34733
You are navigating away from the AIS Discovery experience