MultiplayerShootout Local LAN with Proxy Connection

I need To set up a lan network project behind a proxy connection. i am using the multiplayershootout project. It must work on different machines connected on the LAN. So far i can us the “Play” widget that takes me to my level default and i can find other servers on the “Find Games” widget, but once i try to join a game the client goes to the server for a very small moment than the client game screen gets black and the Listener server ceases to see the Client. I Assume it is because i am working under a proxy connection and the Multiplayer Blueprints don’t work with a proxy wall.

Link to the Multiplayer Shootout demo: Multiplayer Shootout | Unreal Engine Documentation