[ovirt-users] no snapshot function in VM portal

Hi! On a fresh Version 4.5.4-1.el8: in the vm portal are no snapshot operations possible - not for an user_vm_manager and not for a super_user. We have imported VMs from 4.3 with exisiting snapshots. These are listed for the users in the snapshot box but there is also no operation possible for them. Does anyone has a hint? Greetings! Chris