Hummingbird Performance Test

Trying to run a performance test but get 'No results returned, please open a support ticket". Specifically: 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
TRY AGAIN

Can you help?
Mac