As some of you may have already noticed Lens Studio 3.3 contains api changes that break Face Expressions Template.
Starting from 3.3 Component.BlendShapes has been deprecated and Component.RenderMeshVisual now handles available blend shapes, if there are any. So all related methods like hasBlendShapeWeight(String name), setBlendShapeWeight(String name, Number weight) etc., are now part of Component.RenderMeshVisual class.
You can take a closer look at api changes here: https://lensstudio.snapchat.com/api/classes/RenderMeshVisual/
And while we are waiting for next Lens Studio update, here is link to updated version of template :
Feel free to comment here if you have any questions or ran into other troubles!