Can't use R* Editor with custom maps.

[GTA Motorsport]

I currently have Los Santos International Raceway installed, and I'm trying to make a film. But whenever I try to load a clip in R* Editor, either:
The game crashes
Or there's a bunch of missing parts of the map

If I try to edit the clip without loading the map then a lot of things on the map are missing including the starting grid and I'm floating on top of the water.

If I load the map before editing the clip then the game crashes.

Either way, the map is corrupted and a bunch of stuff is missing.

All the mods are up to date including Menyoo, ScripthookV, ScripthookVDotNet, Map Builder, and everything else.

HELP.