How to change to an other skeleton

Hi everyone,
I import the anim starter pack, and I have an other skeleton. I want to use the anim of the starter pack on my skeleton, how can I do that?
i tried to delete my skeleton and then assign the starter pack skeleton to my character but I found some issues such as my character doesn’t move any more and some other issues.
can someone help me please?

Your Character has to have a skeleton that is rigged to it. Now if your character has a skeleton similar to the UE4 one used on the Mannequin you can retarget your skeleton to work with the base one. But like what I found out, if your character has one different to the UE4 one, you may have to get some from where you got it. BTW Did you use Mixamo to make your character’s rig?