It sounds like you’re facing issues related to improper level and network mode management when integrating the main menu with your turn-based game in Unreal Engine. Specifically, the “NetMode: Server” screen appearing in the wrong level (“Card_Table”), and “Client 1” appearing in “Minimal_Default,” suggests that the game is either not switching to the correct game mode or level upon starting the game, or the network settings are not set up correctly for multiplayer.