how to add skeleton to a uasset animation on unreal engine 5.4

Hi i have this animation pack that i got on my friends purchased animation pack i copied the folder and tried to import it directly by copying and pasting on my content folder i successfully did it but the animation doesn’t have a bone therefore it became like this.

also im new to unreal so i really dont have an idea how to do this.

now when i tried to assign the right skeleton it appears the animation now is broken

May i ask for anyone who goes through the same problem and solved it. cause its already been 3 days and it appears i cant find solutions online.

a little help will do thank you.