Errors from opening Unity editor 2018.4.24f1

So, I’m working on Create With Code Live Summer 2020, and i opened the editor up, and i have 38 errors that i don’t know how to fix, or why they are there. most of them seem to be with the scripts that were already there just for the functioning of the editor, and i don’t really want to just mess around with those on the chance i might mess up the editor instead of fixing it.


These are all the specific errors that show up