My server will sync car parts once per restart (part randomizer)

So I made my own server so I could play with my friends, and we wanted to use the part randomizer mod. We can see the parts change once with the sync button but after that one, the server dialog box says “server error can’t get vehicle config.” Is there a setting that I need to change on the server or something. It doesn’t seem to be an issue with the TCP and UDP as far as I know as I can see people change cars.