You should try to add an ovirt node 4.1 if you really want to stay on 4.1 :https://resources.ovirt.org/pub/ovirt-4.1/iso/ovirt-node-ng-installer-ovirt/4.1-2018012411/ovirt-node-ng-installer-ovirt-4.1-2018012411.iso
Whatever, you will never be able to upgrade from 4.1 to 4.4 because 4.4 is only el8.