Symptoms:
Replications failed with "A replication error occurred at the vsphere replication server for replication. 'No connection to VR server for virtual machine 'VM_Name' on host 'Host_Name' in cluster 'Cluster_Name'"
vSphere Live Recovery (all versions)
If there is no network path between Cluster A (source hosts) and Cluster B (where the add-on resides), the replication traffic cannot reach the add-on server.
Manually configure replication by selecting the appropriate vSphere Replication server.