Epic Clinical Applications interview questions

I initially submitted my application through Epic's website. A few day after I completed the application, I was asked to take the Rembrandt Personality test within 24 hours of the email. I took the test the same day and received an email a few days after that explaining they did not want to continue reviewing my application. I requested more information as to what went wrong, but never received a response back. If I received constructive feedback, I would have been able to determine where I need to make improvements.