When I logged into the studio web site yesterday I could no longer edit or add text. The text box is present but I can't type anything into it or edit anything I have previously written. I am also locked out of HTML for the text box so I can't check the code even if I knew how. Any suggestion on a fix?

The site works and can be found on Google so I know it is published:

Link removed

I have a Mac if that helps with a diagnosis?