Hey, no problem sorry that won't work! I am on Linux (at least the Raspberry Pi distro), which is odd. If you're planning it as something anyone can just fork, perhaps it would be a good idea to just leave out the NoteBookDirectory function, and instead create a subfolder in your repository where packages are? For example: SRC- - Main.wl -Notebook.nb -PACKAGES - Package.wl And then use <<"PACKAGES/Package.wl" (or Needs[]) in your notebook file? That should hopefully enable it to work from scratch, as you said I hope. Although I'm not sure whether that should fix the original problem, I'll try and take a deeper look into it.

Hello! I hate to say this, but for some reason your code works for me, so I'm not sure whether it's because you're using a different version of Mathematica? One thing I did note was that the 'NoteBookDirectory[]' function didn't work for me, so I changed it so that it was set to the actual path of your main file. You could otherwise (I believe) just save to the same directory. If you're not getting an actual error though, that's pretty odd. It might just be worth restarting your PC/Mathematica.

To summate quicker, maybe put in the direct file path to your main file into the directory function, and try that. It seems to suggest something wrong parsing the actual package. Hopefully this helps though :)