I'm new to the rigify add-on and I think that I might be struggling with it. I have the armature that comes with the add-on and if I press the generate button it generates a the rig with the root, arms, face... The issue is when I try to pose the rig, the armature doesn't move because the bones of the metarig doesn't have constraints with the rig. I'll upload the project, but is only the rigify add-on loaded.(https://drive.google.com/open?id=1I2CZmrD6FTKLtk5t7MBZP9eYOZQcR6BY). Also, I found the issue in a full modeled model, but it seems to not work on any project. My blender version is 2.79.
Edit: I found that, for some reason, the bones doesn't have constraints.