I click play there is no multiplayer button. I pressed Ctrl+L and F5, it doesn’t help
Ensure the Multiplayer mod is enabled in the ‘Repository’ in-game.
Once you have confirmed it is active (and no other mods are active) restart the game and hopefully it will appear.
everyone its ok launch beamp and when it opens beamng go on mods and there should be mutliplayer mod active it and boom multiplayer button btw press play and theres a option that says mutliplayer