Crash course, notebook 01 Tasks - unreadable text

[apaleyes]

Hi, and thanks for the course! Very nice material to work through.

The issue is about the very beginning of the first notebook in the crash course. Here is what the first section of the notebook outputs on my laptop:

At least on my laptop this is unreadable, black letters on deep dark blue background. Is this machine specific? Perhaps I didn't properly install something?