@abaucom555 ESXi licenses are applied at the host-level, so if they are running ESXI 7 then a version 7 license is fine, but vSAN is licensed at the cluster-level and the cluster is a vCenter-entity and thus the required license version for vSAN is governed by the vCenter version - you cannot apply a version 7 vSAN license if the vCenter managing the cluster is on version 8, your issue here is completely expected behaviour.