It seems like there are some issues with the Addon's generation of the Root bones. I encountered this problem when using the ACTION ADVENTURE PACK on the ELY BY K.ATIENZA Model and with the exact same Model and Locomotion Pack you showed in the video. Unfortunately, I didn't receive any error messages that could help pinpoint the exact problem. If you'd like, I can send you the pack, or you can find it on mixamoo.
Also, Insert Root and Add Root doesn't seam to work too, Add Root adds a root bone, but it doesn't move with the animation.
I've tested both Blender versions mentioned in your video, 3.4.1 and the current one, 3.5.1, but I consistently get the same result.
It seems like there are some issues with the Addon's generation of the Root bones. I encountered this problem when using the ACTION ADVENTURE PACK on the ELY BY K.ATIENZA Model and with the exact same Model and Locomotion Pack you showed in the video. Unfortunately, I didn't receive any error messages that could help pinpoint the exact problem. If you'd like, I can send you the pack, or you can find it on mixamoo.
Also, Insert Root and Add Root doesn't seam to work too, Add Root adds a root bone, but it doesn't move with the animation.
I've tested both Blender versions mentioned in your video, 3.4.1 and the current one, 3.5.1, but I consistently get the same result.