Why isn't my animation for walking playing?

Hi! I’m following a 3rd person controller tutorial series and was setting up the animations for walking and running (I’m using a blend tree), and they won’t play when I move, but it works for the guy in the tutorial. The idle animation works just fine, but walking and running don’t work! If anyone could help, that would be great.
Thanks!

Do you have some code that sets the variables to allow for moving. Like typically there is a speed or isMoving or isWalking variable used in the animation controller.

Can you link the video of the tutorial?