Trying to chnage inplace motions but I can't

Hello everyone I bought this asset from FAB. Sasquatch and I love it, I was trying to use the walk animation which is a inplace animation. I tried to change it in the animation sequence to root motion but it doesn’t change at all. The character does have a root bone but there are no animation blue prints just anim sequences. I couldn’t figure it out so I tried to use the inplace motion but the feet slide, so I tried to use the FBIK rig to put controls on the feet to plant them on the ground but there’s lots of jitters and lots of keyframes. The question is how can i change the otion to root motion if it doesn’t change afer the changes in the anim sequence or other solution to plat the feet. Thank you, I’m just so new to this and following youtube tutorials just take me to differnet solutions that so far have not worked. Thanks