How to fix raspi-config "The splash screen is not installed so cannot be activated"

Problem:

You want to enable the boot splash screen on your Raspberry Pi using raspi-config, but you see this error message:

The splash screen is not installed so cannot be activated

followed by There was an error running option B3 Splash Screen

Solution

As you can find out from reading the raspi-config source code, it checks for the existence of /usr/share/plymouth/themes/pix/pix.script. In order to install this file, install the rpd-plym-splash package:

sudo apt -y install rpd-plym-splash