I started this build.
The Ventoy issues has been fixed, no one has reported problem using Ventoy since that fix was implemented. For other installation problems look in Forum Resources Index.
What to do if there is a problem installing OMLx
The logs that article shows user how to produce are very helpful to Calamares and OMLx folks trying to help users with installation problems.
There is lots of other good stuff in Forum Resources as well as in OM-Wiki. Use it.