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.
Reference