Retargeting animation from EPIC's animations to Mixamo character fails by getting choppy hands

So I tried to retarget an animation from Animation Starter Pack to a mixamo character that I made in Adobe Fuse. I have followed the tutorial from Unreal Engine 4’s youtube channel, I’ve set the rig to humanoid and set all the bones that I had but my arms get choppy and bigger. Is my character messed up, did I do something wrong and if yes is there any solution?

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