Can't test WAN speed

Hi. I’m using two hAP ac routers and trying out CAPsMAN functionality.
When I’m connected to the router it does seem to put switch from one to another when I’m connected.
I also need to test speed and conectivity of this setup. And the problem is when I use two computers that are connected to this Wifi, (one is running a server and the other is running a test)
It always say that it wasn’t able to make a connection and connect to the server.
What might be the problem for that?

In your capsman datapath config, have you allowed client communication ?

Edit: right term is client to client forwarding. Enable it.
While you are at it, considering using local forwarding. It will improve data speeds.