Great link for the missing shader @teocomi ! It solved the issue.
These 2 shaders should be added into:
Project Settings → Graphics → Built-in Shader Settings → Always Included shaders
I also found another issue which I didn’t mention, The RoslynDirectoryCreator.cs script is by default in the Extra folder, but if you want to build the project the outcome won’t be so Extra 
since it throws a missing reference error which looks something like this:
Assets\Extra\RosolynDirectoryCreator.cs(13,4): error CS0246: The type or namespace name ‘InitializeOnLoad’ could not be found
Since I’m not sure if we need this in the build at all I just created a new folder in the Assets and named it Editor, I placed the script there, and the build should be successful since the Editor folder won’t be included in the build by default. Let me know if it’s a wrong or a reasonable solution. 