URL parameter not working #12

From the documentation for web integration

https://docs.readyplayer.me/ready-player-me/integration-guides/web#configuration

I try to implement URL parameter to your demo

I want to use iframe setting the generator for half body only, then i add

bodyType=halfbody

Like this

https://demo.readyplayer.me/avatar?frameApi&bodyType=halfbody

But, Your system is not automatically set up for half-body option

Thanks before