Strange message from Safari for Upfront

First, the reason I'm posting this in General rather than in Themes is because this question form won't allow me to select a theme.

I just installed Spirit. I went to the About page. When I clicked on Upfront in the toolbar I got a dialog box message from Safari that says " Please, hold on for just a little bit more."

When I click OK, the box goes away but I'm still on the About page with Upfront not appearing.

Any and all help appreciated. Thanks, Martin