I've looked for the cause of the black loading screen problem like you said and found this:
[22:20:42] [ERROR] Caught fatal unhandled exception:
System.NullReferenceException: Object reference not set to an instance of an object.
at Drag_Meets_Reborn.DragMeets.HandleMeetSpawnDespawn(Boolean immersive)
at Drag_Meets_Reborn.DragMeets.OnTick(Object sender, EventArgs e)
at GTA.Script.raise_Tick(Object value0, EventArgs value1)
I tried to reset the script and respawn the meet but it still wont fix, I even reinstall the game.
It's weird because a night before it still works without any problem.