associated script error when Nothing is wrong

This is the second time this has happened to me in 2 days. I’m not writing any of my own scripts, but using just the Player Controller and randomly when I try to Play it will say “the associated script cannot be loaded” referring to just the Player Controller scripts. I did not touch or edit these in any way and I’ve tried re installing Unity, deleting all the Meta files so that it reloads, deleting the player controller and re importing it, and etc and NOTHING is working. There has to be a reason for this and a way to fix it without me having to re build the entire project from scratch.