I can't change the car interior colour on a streamed car

So this server I’m on added a Supra A90 model, this one specifically 2020 Toyota Supra A90 [Add-On | Template | Wheels | Tuning] - GTA5-Mods.com, and for some reason it’s interior work can’t be changed from it’s bright baby blue colour nor it’s break calipers. I’ve reached out to the author of the model, and others have too, but to no avail as they seem to be AWOL.

Any help on this?