This should be addressed by the following pull request: Assume 3 when can't determine API version https://github.com/ManageIQ/manageiq-providers-ovirt/pull/108
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Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHSA-2018:0380