Configured Vehicle Class Does Not Pass Filter

I am using the SteamCMD dedicated server and the Studio 397 GT3 cars to host league races.
However, we seem to get:
"Configured Vehicle Class Does Not Pass Filter". Then the driver is booted from the server.
Currently this is only on the number 2 Mercedes GT3
The other cars all work.
I'm sure I can work around it, but if I get the issue again I was wondering what sort of troubleshooting steps I can do to work around it.

 

It may be because that car's class seems to be defined incorrectly. If you look at the AI opponent filter, that car only shows up when you select a class called "template".

 

That's it. Add in 'template' to the allowed vehicles and we can connect.
As you said, it must be defined incorrectly.
Thank you.

 

No worries, I'm glad that helped.

 

Where do you add in 'template'?

 

It's when you are choosing which car classed you want to run.
Launch the dedicated server and next it through. You get a list of car classes you can add. The Mercedes was incorrectly named as "template" and not the class it should be.