Hi gsap developer, I have a problem with a plugin that I want to use, it doesn't work, I have followed the rules in this documentation but when I run it, it doesn't work. why is it not working, did i do something wrong?

This is the source code link, the problematic project folder is in src/2.PluginTraining/01_cssRulePlugin/apps.jsx

https://codesandbox.io/s/sleepy-meadow-4nmzv?file=/src/2.PluginTraining/01_cssRulePlugin/apps.jsx