[ovirt-users] Installing VM - Fedora installer stuck on "Setting up installation source..."

Hello, I installed oVirt 4.3.2, added NFS ISO domain and trying to create Fedora 26 VM. The installer starts but is stuck on "Installation Source Setting up installation source..." on the "INSTALLATION SUMMARY" screen. I cannot find any useful information in logs. Do you have any idea what can cause the issue and how to fix that? Thanks Jarek