Ok, you must install the Rendercows on ALL computers that participate in rendering. Which means in fact, on the computer you are running Vue (host computer) as well.

Then the cows must run of course.

To get a connection to the other cows, my experience is that it is best to enter the ip address(es) of the other computers. And not the names. "Disconnect" in your case could mean in fact that your host computer is not seeing the cows really. Only for the cow on the host computer it is enough to enter the name "localhost" instead an ip address.

One day your ship comes in - but you're at the airport.