I found their quiz very easy except for a couple of questions, which I think I answered correctly anyways. I got the same message. You have probably hit the max score as well.
All-in-all, this doesn't seem to do the clients justice if they don't throughly test to see what prospective candidates are made of by pushing their real-world problem-solving abilities, intuition, knowledge, and expertise.
My conclusion is to dissuade the use of TB as a candidate or as a hiring manager.
The online quiz itself wasn't difficult if you knew what you were doing, but it seemed well designed to discern clueful candidates from those who needed to brush up. I know people who took it and didn't pass.