3D Rendering Sample does not work.

In Citra, giving the cube.lua script a texture and trying to run it results in a White Screen. On the 3DS, LPP has issues figuring out where the texture is supposed to come from, and multiple different solutions like using System.currentDirectory().."/cube.png" did not work.

Even if Line 2's Variable is a correct path, LPP has trouble with the variable on line 83, saying that it doesnt exist.
If any of you here are still at all active and can figure out how to get this sample working on either 3DS or Citra or both, please let me know, because I have tried everything and it just does not budge.