Mesh does not move along with bones I'm kind of new to this, I was following this tutorial and everything was going fine until I tried to move the character in pose mode, FK wasn't doing anything and I don't know what's wrong

I'm using blender 2.79

https://drive.google.com/open?id=1-7uITyf-_iHMQ-U5oiSZ8TdnqtNF1msP
This slider decides if IK will move the arms, or FK (and it can be animated).