NnUtils should always be in your Assets
directory.
Navigate to your git repo and run:
git submodule add https://www.github.com/nnra6864/NnUtils Assets/NnUtils
git submodule update --init --recursive
In your Assets
directory run:
git clone --recursive https://www.github.com/nnra6864/NnUtils
NnUtils also has some dependencies that can't be automatically installed.
Newtonsoft JSON - Required by JSONUtils
Get it by using Install package by name
in the Unity Package Manager and pasting the following com.unity.nuget.newtonsoft-json