Hi, before it was possible to open a Server and a Client window at the same time, by setting NumberOfPlayers to 2. But the Multiplayer Options have changed in the Play in editor dropdown :
Using this settings Open two times a Server window, how to open one Server window and one Client Window?
It does actually open one server and one client on my end. 4.25.1
Just take sure you have Net Mode set to “Play As Listen Server” as shown in your screenshot. If this is set as “Standalone” two standalone windows will open instead of server and client.