I can't expand the website builder's work area

You know that spot in the lower-right corner of the text/work area you'd normally click and drag to make the area you write in bigger? The one in APWT's website builder isn't working; see the image below. The red text pertains to the technical problem; the rest is just part of the web page.

Thanks in advance for fixing this.

I understand. You can use this 'Fullscreen' button instead to make the area bigger

Thanks. That does help, though it would be nice if the "expand" function functioned, haha.