Ah yes my mistake as I trought because of https://support.f5.com/csp/article/K08061420 that the tenants also have issue.
Has this article been used https://support.f5.com/csp/article/K34776373 to upload the iso controller and partition images with the controller floating IP address?
scp <iso_filename> root@<Floating_IP_of_Controller>:/var/import/staging
Also as a note Velos takes a lot of time so waiting maybe half an houror more could be needed and I had an upgrade but I think it was from 1.3 to 1.3.2 so maybe try first upgrading to 1.3 if it helps.
Hope you will not need a Clean installation to make it working.