@olivierlambert Thank you, this was the solution.
I was able to create an additional pfSense VM and a Debian 10 VM.
One question, how do I know the username/pw for the installed Debian VM?

Probably a dumb question, but what is the user/pw for the Debian vm created with with the template, or how do I set it?

I just installed the XOA appliance through the webpage of the server, entered my registration (free), and updated to 5.38 (no newer updates available).
I also do not see the "Hub" tab.
Is there something I do wrong?

@axiom00

Thank you for your answer, this worked great.
Was able to clean the entire list of old versions this way.

Hi,

I noticed when using XOA and want to attach an iso to a vm (most of the times the guest-tools), there is a long list of previous versions of the guest-tools visible before I can select the actual version.
XCPng-center does not show the "old version of guest-tools.iso" entries.

In XOA I can see there is a storage repository "XCP-ng Tools ISOs" containing the old and actual ISO's, but when I try to delete the old ones I get an error "SR_OPERATION_NOT_SUPPORTED(OpaqueRef:4143d1cc-96b6-aed3-30b8-51aaeb78ff54)"
(This repository is not visible in xcpng-center by the way)

Is there a way to clean up the old guest-tool iso's, or instruct xoa not to show the old version entries just like xcpng-center?