Missing Textures on older mods

[bunderbilt]

Rigs of rods 2021.04
Windows 10

So I've been looking at old mods and when I spawn them in the game, the wheels are either white or the truck is red. Help?
((pictured; Leyland Roadtrain Ampliroll (all versions are like this) Volvo F12 Ampliroll))

 

[NotMopar]

as far as i can tell its some sort of compatibility issue with older meshes. the mesh upgrader that comes with Ror might or might not fix it.

 

[Austin]

Those vehicles don't even have meshes. But ok... Usually the spawner log will tell you what material/texture is giving an error.