Continuing the discussion from Game is not connected to the launcher:
Hey, I got the same error. I just got a new pc and installed beamng and wanted to play beammp. After I installed beammp I just get the error “The game is not connected to the launcher! Please start the game using the BeamMP Launcher.”
But I’m using the launcher. I reinstalled both beammp and beamng and run them as admin but nothings works 
EDIT: The game starts as normal but when I open the multiplayer the error shows up. I also stopped my antivirus but that doesnt work either