Customizing Typography fails ?

I’m using WordPress 4.7 and tried Make (free, v. 1.7.11) from the official theme repository.

When it comes to section “typography” the font selection list (font family) isn’t working at all. Default entry is “Open Sans”. When clicking it becomes grayed out with entry “Select an Option”. It’s neither working with Firefox 45.4 nor with Chromium 53 (both running on Debian Testing 64Bit, Ubuntu 14.04 64Bit).

I thought Google-Font selection is part of “Make free” too, while Make Plus adds support for Typekit ? Am I wrong ?