unable to run a performance test

Hey. I get the following error:

“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”

Please advise on how to fix this.

Thank you!

The page I need help with: [log in to see the link]