This is due to the wasp probe not being able to find the discovery_server probe on the primary hub.
Please verify the ump_common directives in the UMP's wasp.cfg and that the discovery_server probe is operational.
The address is case sensitive and should follow the below format.
discovery_server = /becph01-T3401_domain/becph01-T3401_hub/becph01-t3401/discovery_server
Once resolved, restart the wasp probe.