Animation Window Buttons Don’t Work, How Do Fix This?

I made an animation then Accidentally deleted some assets (The ones that get imported when you make an animation) Then the buttons didn’t work in the animation window. I tried remaking them in the project window but it still didn’t work. How do I fix this? The buttons don’t work in ANY project/game.,I’ve created a animation for a transition in in my game then I Accidentally deleted some assets (The Ones That That get Created when you make an animation)
I remade the assets in project window but it still didn’t work. What do I do now?
It doesn’t even work in other project/games.

Do you mean when the buttons (“play” or something else) are faded and you can’t press them?