Hi team,
Sorry for your trouble.
I have checked this intensively this morning, as I never answer from memory here. The Male figure from the Content Browser here is based on the “Bendy-Set Up”, this is not the one used in this tutorial. Is that the one you have used? You can see that on the many bones in the legs, for example. I believe that will not fly with a Mixamo-rig MoCap data.
I have recorded a short run down. I focus here on the Mixamo Rig (as mentioned in the tutorial), as it matches easily with the MoCap data in the Content Browser and (naturally) with the Mixamo content.
Screen capture (quick example)
https://www.amazon.com/clouddrive/share/D45JCYod0cw44LlWJ9ZjrZKT2ZpoFagS7U2c23OKvTo
Let me know based on the time in the screen capture, where you get stuck. I will have then a closer look at this.
All the best