VMware Cloud Director Availability 4.7.3
This issue occurs because the HBR agent VIB is not installed on the destination ESXi hosts
To resolve this issue install the HBR agent VIB in all the ESXi hosts. To download the HBR agent VIB file directly from the appliance:
https://vCenter_Replication_Management_Appliance_Address:8043/hbr-agent.vib file.https://Replicator_Appliance_Address/hbr-agent.vib file. /opt/vmware/hbr/vib/vmware-hbr-agent-build_number.i386.vib file.