Blender PitchiPoy Rig: Legacy crash on 2.79

Hello everyone,

i am using the PitchiPoy Rig (or “Human Meta” Rig) for the first time in Blender. I was really exited because it even has face controls. So i enabled the addon in 2.79 and positioned all the bones inside of my character.
Now when i want to generate the rig from the metarig to get controls and everything, this message pops up:


So first of all, i generated the metarig in 2.79, why are there still deprecated rigify-rigtypes in it?
Second, when i click on “switch to legacy”, blender crashes immediately.
Does anyone know why this is happening?

I know it is kinda late, but it means there is another armature that is using old rigify system. Delete that, and your metarig will be restored.