How do i properly import this boss to my map?

HELP NOOB QUESTION

i have imported a boss from protofactor by dragging and dropping them into content folder.
Everything appears to show up but no animations work and it says no skeletal mesh found for skeleton. (circled in image below bullet 1.)
Then i thought all i had to do was add a mesh into the skeleton so i went into the skeleton but when i click “none” in preview mesh (circled in image below bullet 2.),
nothing shows up nor can i drag my mesh. I’m assuming I’m doing something fairly simply wrong lol any help is very much appreciated on this topic.

Thanks
Dirtiied

Moving to the World Creation forum

thanks @Flak
sorry about that

little more context, i was able to fix this by selected the animation and adding new skeleton for animation, but the animation still appears to be idle and not working as intended. not sure what i’m doing wrong.