As I browsed through Ubuntu Software, I wanted to install Anki (build number 2.1.0+dfsg~b36-1) on my Ubuntu 18.04 machine.
Launching the application did not open a new window, but rather opened a Crash Report window after some time.
Fortunately, the solution to the problem was just a couple of comments down the application page:
sudo apt-get install python3-distutils
Running this command from terminal lets you start the application.
I had a look at the Ubuntu package definition, and indeed this dependency is missing there. Less encouraging is the fact that this very issue has been reported one and a half years ago.