I know we were told to use the same Unity version as the instructor (2019.1.0f2) but I’ve been using 2020.3.32f1 because it made sense to be on the (recently) latest LTS (spoiler, Unity LTS is now 2021).
However, I’ve been running into a bug where adding a bunch of states, like in the lecture, caused the inspector to break.
I searched online and found a workaround: put the Inspector in debug mode:
For more info:
https://answers.unity.com/questions/1893253/impotant-bug-in-animator-unity2020331f1.html