rigify problem object detach from rig/bone while playing animation

Hi there

I am new to blender animation specially (rigify) but I already know how to model in blender; I am working on animation I use the rigify add-on to rig my character and I create a simple walk animation and now I face a problem and that is when I hit play button the 3D model detach/unparent from bones and fall down, I don’t know why.

Any help is appreciated

Looks like you’ve added some sort of physics sim to your mesh object by mistake. Probably Rigid Body. Check the physics tab and turn off whatever it is.