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)
at GTA.Script.MainLoop())

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.

I really love this mod, but since i download ver 1.9.4 I cant spawn meets anymore, it always black loading screen for me. I've tried auto spawn but the AI just stand next to their cars and do nothing, you have any ideas why this happen?
Beside that, this mod is very awsome, thanks for your hard work!