Hi Mate!
Do you have any other Mods installed which are not from the Weissbierbude?
This could cause the trouble. It's a known problem in Race07 that some mods will conflict because of their Model-ID's. We check the mods only if they work with the Mods which are already on the Bude. We can't check them with all the mods out there because it's too many stuff
The easiest solution would be to delete your "Teams"-folder which can be found in "X:/../steam/steamapps/your profile/race 07/GameData/". After that you can run the "Command -> Reinstall" in the Update-Script, everything will be installed new from your archive, so no new download would be necessary.