I’ve been thru the section and it feels quite out of date now.
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The Meta files viewing is not in 20 or 21
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Package Manager is now used to Import Assets and Packages
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The GutHub for Unity has not been updated sice 2019.
I got an spinning logo forever when trying to use it and when signing in I got an error.
I didnt keep it for long as didnt seem much point but did easliy roll back my project to before adding the package!
I think you need to check its working on current Unity and make course adjustments as necessary
PS Did enjoy the course and have been stumbling around SourceTree for a while but now feel more confident I know more where to go and what to do instead of seat of pants and crossed fingers. Cheers