I can't turn the page

I just came back to LingQ after a long break so I’m unfamiliar with much of the new layout. However, I started a lesson in German but when I click on the arrow to turn to page 2 nothing happens. I looked at a lesson I’d completed some months ago (in Italian) and it worked fine. Is there a bug or am I doing it wrongly? I’m using my tablet by the way, I don’t currently have access to any other computer.