This site never seems to work. Always says to call customer service, but guess what? Customer service is closed.
When adding a vehicle it throws the Internal Error Found error, but somehow the car is actually added. You have to log back in, and you should see the vehicle registered.
They really need to update their terribly buggy site.
I always seem to get something like this:
We have received an internal error while processing your request. The internal error message is:
Internal Error Found. Please contact Customer Service.