Hi… It would probably help to post the exact commands that you’ve been trying, since some ways of creating Machines will stubbornly cling to older volumes, etc.
Also, is it complaining about the same volume ID each time, and the like?
This just shows its default Machine size (which is performance-1x, non-GPU), whereas GPU hosts are a completely disjoint subset, as I understand it.
You can try to use the underlying Machines API to query instead for the desired GPU flavor, but that part of the infrastructure is suspect lately (unfortunately). For example, iad is currently showing negative capacity (for the default performance-1x).