The convex hull generator seems to like to fail with certain combinations of 3D vertices at certain positions. This is just one example of vertices that cause this to happen.
https://pastebin.com/0wRDKFYB
interestingly enough, offsetting these vertices to another position seems to allow the convex huller to work just fine. I am running the latest version of the library, taken directly from the github master branch.
Error message:
Failed to find initial simplex shape with non-zero volume. While data appears to be in 3 dimensions, the data is all co-planar (or collinear, co-hyperplanar) and is representable by fewer dimensions.