First, I can’t click “play” on Server and join with client as shown here:
I can only do it other way around–clicking “play” on client and finding session with server. Even then, when I try to join client’s game, I see loading screen popup on server momentarily before both windows just close ( editor doesn’t crash). If I try to click “play” on server, Client’s menu screen immediately goes black, I lose mouse cursor, and can’t click any buttons.
I have also tried to implement session nodes in my own project and get same black menu screen on client when I try to host a game on server.
If I simply play from Level_01, then I see both Client and Server windows rendering game.
I have also done “Use single process” fix as shown here: