You move an unprepared host from a non-vSphere Lifecycle Manager cluster to a vSphere Lifecycle Manager cluster. As N-VDS host switch type is not supported, apply a transport node profile that is configured to use a VDS host switch. VCenter Server checks for cluster eligibility so that the cluster can be converted to a vSphere Lifecycle Manager cluster. You try to enable vSphere Lifecycle Manager on a cluster using a transport node profile configured to apply N-VDS host switch.
VSphere Lifecycle Manager cannot be enabled on the cluster because a transport node profile was not applied to the cluster. You try to enable vSphere Lifecycle Manager on a cluster where transport node profile is not applied, but some hosts are individually prepared as host transport nodes.