Cannot connect between clusters RP4VM 5.3

Hi everyone:

I have a problem when I try to connect one cluster to another. Using the wizard or by console, it exits with this error "Could not reach the remote cluster "

The ip is correct, the ping to that vRPA does respond, what could it be?

Note: The rp4vm is on a single node. It has vcenter and 2 vRPA, the topology is all-in-one. The remote cluster is in another network and its topology is lan+wan, separate data.