Hello!
The location where you looked at is correct, but the setting is indeed missing there. Based on the Unity version it may look slightly different in the inspector compared to the docs:
But in your version it is missing completely. I was able to reproduce this behavior with the following steps:
- Open the scene in Unity (without having the package dependencies downloaded) -> I get the package dependency error
- Close Unity, download dependencies via the scripts/DownloadUnityPackages.ps1 which is part of the repo
- Open the scene again in Unity
However, when I start with an absolutely clean git repo, then download the dependencies before I open the scene for the first time, it works fine for me.
That leads me to the conclusion that Unity caches some settings that persist even when fixing the dependencies.
Can you maybe try cleaning the sample repo (git clean -dfx) and Unity cache again and then download package dependencies before you open the scene?