vtk.js: Glyph3DMapper does not add glyphs

I am trying to follow the code given in the Glyph3DMapper example. I copied the code given but I don’t see the same ouptut. Here is the codepen I am using https://codepen.io/nikhil216/pen/gOoMabj.

The glyphs do not appear instead the original plane source gets rendered. I need some clues to move forward. Any help would be appreciated.

You missed the following import

import "https://cdn.skypack.dev/@kitware/vtk.js@23.2.0/Rendering/Profiles/Glyph";

Great! I didn’t notice that import statement. Thanks a lot