Glitch frame when attaching skeletal mesh to capsule

I did get it to work finally, but it was so long ago I don’t remember many details. I think the main thing was that was not attaching a separate little ‘root’ bone at the feet of my skeleton like they did in the video. And then maybe setting it to Kinematic? If you are looking at the same video that I did, he adds this root bone to the skeleton, and at first I wasn’t doing that or was doing it differently than he did in the video. Seems like it started working after I did that.