Standard assets broken

So the scripts that come with unity randomly stopped working and i can’t add any more scripts or anything. I am no veteran coder so i can’t fix this.

I sent this to unity support (since it’s there problem) and they said that i need to fix their problem.

Did you update Unity to a newer version?

Image Effects are being updated with each Unity version, so when you update to a newer Unity version, you need to delete old Standard Assets and import new ones.

This is not Unity’s problem, it clearly says that a method is checked override but there is no source to override. It’s either missing, or a really old version that does not match with your editor version.