There are several things that can cause this.
Physical Issue: Check your RAM and HDD or SDD plug in/ contact points.
Software:
You can boot to the Recovery Menu
From Recovery Menu, first enable networking.
Back up to the menu and arrow key down to Drop to Root Prompt.
Hit enter
Then enter in the following commands (You probably do not need sudo due to root prompt, but I include them for ease for other users that need similar instructions)
sudo apt update && sudo apt upgrade
sudo apt clean && sudo apt install --reinstall plymouth
sudo dpkg --configure -a