I recently installed oVirt 4.2 on centos 7 and it turns out that it gave me the following error when trying to execute the command engine-setup

[root@localhost ~]# engine-setup
[ INFO  ] Stage: Initializing
[ INFO  ] Stage: Environment setup
          Configuration files: ['/etc/ovirt-engine-setup.conf.d/10-packaging-jboss.conf', '/etc/ovirt-engine-setup.conf.d/10-packaging.conf']
          Log file: /var/log/ovirt-engine/setup/ovirt-engine-setup-20180320051815-eon9vg.log
          Version: otopi-1.7.7 (otopi-1.7.7-1.el7)
[ ERROR ] "before" parameter of method otopi.plugins.ovirt_engine_setup.ovirt_engine.network.ovirtproviderovn.Plugin._misc_configure_ovn_pki is a string, should probably be a tuple. Perhaps a missing comma?

          methodinfo: {'priority': 5000, 'name': None, 'before': 'osetup.ovn.provider.service.restart', 'after': ('osetup.pki.ca.available', 'osetup.ovn.services.restart'), 'method': <bound method ?._misc_configure_ovn_pki of <otopi.plugins.ovirt_engine_setup.ovirt_engine.network.ovirtproviderovn.Plugin object at 0x1592790>>, 'condition': <bound method ?.<lambda> of <otopi.plugins.ovirt_engine_setup.ovirt_engine.network.ovirtproviderovn.Plugin object at 0x1592790>>, 'stage': 11}
[ ERROR ] "before" parameter of method otopi.plugins.ovirt_engine_setup.ovirt_engine.network.ovirtproviderovn.Plugin._misc_configure_provider is a string, should probably be a tuple. Perhaps a missing comma?
          methodinfo: {'priority': 5000, 'name': None, 'before': 'osetup.ovn.provider.service.restart', 'after': ('osetup.pki.ca.available', 'osetup.ovn.services.restart'), 'method': <bound method ?._misc_configure_provider of <otopi.plugins.ovirt_engine_setup.ovirt_engine.network.ovirtproviderovn.Plugin object at 0x1592790>>, 'condition': <bound method ?.<lambda> of <otopi.plugins.ovirt_engine_setup.ovirt_engine.network.ovirtproviderovn.Plugin object at 0x1592790>>, 'stage': 11}
[ ERROR ] Failed to execute stage 'Environment setup': Found bad "before" or "after" parameters
[ INFO  ] Stage: Clean up
          Log file is located at /var/log/ovirt-engine/setup/ovirt-engine-setup-20180320051815-eon9vg.log
[ ERROR ] Failed to execute stage 'Clean up': 'NoneType' object has no attribute 'cleanup'
[ INFO  ] Generating answer file '/var/lib/ovirt-engine/setup/answers/20180320051817-setup.conf'
[ INFO  ] Stage: Pre-termination
[ INFO  ] Stage: Termination
[ ERROR ] Execution of setup failed

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