Hi! I’m having an issue where my the “Multiplayer” settings button is missing in the “Options” tab. The “Sync” button is also missing in the “Vehicle Config” tab. Any help would be greatly appreciated. Thanks! 
Hello!
Make sure BeamMP mod is active in the mod manager.
Yeah, my mod is active in the mod manager. I’m in the game and the the UI is missing. Here’s a screenshot:
Never mind, my issue was caused by having other mods activated before joining a server. I fixed the issue by deactivating them. Thanks!