Performance test failure

Hello,
For some reason after installing the caching with cloudfare I can no longer run a performance test on this site. Not sure what else I may have done wrong.

Message reads:

The performance test didn't return any results. This probably means you're on a local website (which we can't scan) or something went wrong trying to access WPMU DEV. Try again and if this error continues to appear please open a ticket with our support heroes