How do I change out a character mesh/skeleton?

Good idea Adnoh!
Since my Character Skeleton had the same skeleton the UE4 Mannqeuin had, all I had to do was switch out the Skelectal Mesh with the UE4 Mannequin’s Skelectal Mesh. From there I changed the Mesh to the new character and added the animation BP that is used on the characters to the new character.

However, my game is now crashed and currently trying to figure out how to fix it.