Adding Google Fonts in ‘Customise’

Hello folks,

I have recently installed the theme Median.

The h1 on single posts is supposed to use either a Google or Adobe font – Playfair Display or ModernoFB.

But I can;t get either of them to display.

The theme’s FAQ says this:

Go to Appearance > Customize > Font to choose your font. The theme is integrated with: Google Fonts. Choose whatever suits you best. The demo uses “Nunito” and “Playfair Display”, which are paired very pretty. You can find any other alternative on Google Fonts.

I have tried following those instructions, ‘enabling Google Fonts’, and then entering the font name, but it doesn’t seem to do anything.

Any ideas how to get custom fonts set up?

Thanks in advance.

The page I need help with: [log in to see the link]