Can’t switch pages on customizer

Hello everyone,

I’m so far in total awe to this incredible theme (it’s my new favourite hands down), but I’m experiencing a frustrating issue: I’d like to click “blog” from the Customizer in order to set it to “one column”, however nothing happens, the Customizer stays on the Front Page never displaying anything else, no matter what I click.

what I already tried: I tried three different browsers, with and without addons, all of them behave in the same way. I’m using Linux as OS.

any tip is welcome 🙂