Gmod Playermodel Legs Animation Bug (Proportion Trick)

[FarakW]

I wanted to use the proportion trick for my playermodel and so I followed this tutorial:
https://www.youtube.com/watch?v=GyR3mGuH_3c&list=FL_HpejUIEjVHHNOYgaMgtEA&index=2&t=1709s

After compiling everything, I looked at how it looked. Everything was perfect except for the legs:
They lean to the right when the playermodel is walking.
The right leg shifts to the right when the model moves.
The left leg shifts to the right and forward.
The ankles twist.

I redid all the steps of the tutorial twice to be sure not to have missed something, but it gives the same result.

(Sorry in advance for my English)

https://i.imgur.com/897D8Gp.png
https://i.imgur.com/gaNK36j.png
https://i.imgur.com/ThW1hmJ.png