Camera View not rendering with babylon js

Hi Gens,
I am following the tutorial to set up a face tracking project with babylon js. However, the camera view not rendering on my canvas and the only log I is Unable to process frame. Wander if anyone have any idea.
attach the full console log below in case it helps

Hi @yuxuan,

Looks like you’re using the alpha release of Babylon.js, which we do not currently support. I would suggest getting started using one of our bootstrap templates, or simply downgrading your project’s babylonjs version to the latest stable release.