Tip: The provided blend file is sensitive to change, and beginners should start with a fresh file

Because there are already collections established, creating new ones and assigning them without much experience (like I'm my case) led to a lot of frustration. Starting a new file seemed to have done the trick. 

  • Jonathan Lampel replied

    Hey Shin, thanks for the heads up! I'll be sure to make it easier to work with when I update this course for 2.8.