orchestrator address unknown error

[vyuldashev]

Orchestrator prints:

ERROR orchestrator::oracle_resync] Failed to get last event nonce (Cosmos gRPC error status: InvalidArgument, message: "address: unknown: invalid request", details: [], metadata: MetadataMap { headers: {"content-type": "application/grpc"} }), is the Cosmos GRPC working?

register-peggy-delegate-keys succeed before