Unclickable blue screen won't allow further progress

I am currently trying to complete Danish 2 (iOS 12.4). Memrise was last updated on August 19th. Every time I get to the “Learn New Words” section, partway through the exercise (after six or seven examples), a screen with a blue background will pop up with a Danish sentence in white text in the middle. Bits of text from the previous screen are visible around the edges. I took a screenshot, which hopefully uploaded.

It doesn’t respond to anything I do–the only thing I can do is close out of the exercise with the “x” in the corner and go back to the main “Learning” screen. It seems to be impossible to get past it. I cannot complete a day’s practice; Memrise is currently unusable. I have tried about half a dozen times at this point and the result is always the same.