Error when running Performance Test

I was using HummingBird plugin fine but now when trying to run a performance test I am receiving this message below. **Please include lauri@***.com when responding to this ticket**

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