[ovirt-users] Failed to add new host to oVirt 4.4.3.11-1.el8

Hi all, Adding a brand new installed oVirt node to oVirt 4.4.3.11-1.el8 fails; engine.log will tell: 2020-11-13 10:05:40,777+01 INFO [org.ovirt.engine.core.dal.dbbroker.auditloghandling.AuditLogDirector] (EE-ManagedThreadFactory-engine-Thread-5) [80e3f255-f8b9-4d5f-9be2-ebb59fec28db] EVENT_ID: VDS_ANSIBLE_INSTALL_STARTED(560), Ansible host-deploy playbook execution has started on host Bigvirt. 2020-11-13 10:05:40,784+01 ERROR [org.ovirt.engine.core.common.utils.ansible.AnsibleExecutor] (EE-ManagedThreadFactory-engine-Thread-5) [80e3f255-f8b9-4d5f-9be2-ebb59fec28db] Exception: Failed to read the runner-service response. Unexpected character ('<' (code 60)): expected a valid value (number, String, array, object, 'true', 'false' or 'null')  at [Source: org.apache.http.conn.EofSensorInputStream@6cc9953a; line: 1, column: 2] 2020-11-13 10:05:40,785+01 ERROR [org.ovirt.engine.core.bll.hostdeploy.InstallVdsInternalCommand] (EE-ManagedThreadFactory-engine-Thread-5) [80e3f255-f8b9-4d5f-9be2-ebb59fec28db] Host installation failed for host 'df87842f-0852-4a3a-898b-2b724b068199', 'Bigvirt': Failed to execute Ansible host-deploy role: Failed to read the runner-service response. Unexpected character ('<' (code 60)): expected a valid value (number, String, array, object, 'true', 'false' or 'null') Anyone got a clue? Winfried