Can someone help me?

[Limmp]

https://gyazo.com/c7693ffa26b0cbcdd0dd902987d40d4c

[AfterAfterlife]

UIParent.lua is a file made by Blizzard and it shouldn't break like that.

I'm pretty sure you must using some addons that are causing this. Enable one by one, and then report them faulty addon here.