Energy Visualization problem in 4 Gaussian Wells Example

[LilacPeregrine]

I am having some issues learning how to work with this package. Some of the examples don't seem to work the same way on my computer.
Most work, but there are two that don't.

Specifically, 3D_two_gaussian_wells.py, line 21, references a variable "N0" which doesn't exist, leading to an error.

Also, I am having problems with the animation in 4 Gaussian Wells. I see the wavefunction visualization, but I don't see the energy levels? it's odd, because it's otherwise exactly the same as the example.