Hummingbird can't scan for performance

I'm getting the following error on two of my sites (same host btw).
I'm also getting an error when I try to scan the sites using the Google page speed tool .
Any recommendations?

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