Attribute error while trying to import prolintpy

I have installed prolintpy using the third method outlined in the documentation. I ran into an import error while trying to import prolintpy, as detailed in the previous issue (#6 ) that has been kept open by you. I thought the problem would be resolved after following the solution outlined in the thread but now I'm getting this

---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)
/tmp/ipykernel_8570/3457557373.py in <module>
      1 import mdtraj as md
----> 2 import prolintpy as pl

~/anaconda3/envs/prolint/lib/python3.7/site-packages/prolintpy/__init__.py in <module>
      5 from .vis.show_points import show_points
      6 from .vis.show_network import show_network
----> 7 from .vis.show_contact_projection import show_contact_projection
      8 from .vis.show_distances import show_distances
      9 from .vis.show_radar import show_radar

~/anaconda3/envs/prolint/lib/python3.7/site-packages/prolintpy/vis/show_contact_projection.py in <module>
      4 from matplotlib.pyplot import cm
      5 
----> 6 import nglview as nv
      7 
      8 from prolintpy.utils.shift_range import shift_range

~/anaconda3/envs/prolint/lib/python3.7/site-packages/nglview/__init__.py in <module>
      2 
      3 # for doc
----> 4 from . import adaptor, datafiles, show, widget
      5 from ._version import get_versions
      6 from .adaptor import *

~/anaconda3/envs/prolint/lib/python3.7/site-packages/nglview/show.py in <module>
     11                       RdkitStructure,
     12                       TextStructure)
---> 13 from .widget import NGLWidget
     14 
     15 __all__ = [

~/anaconda3/envs/prolint/lib/python3.7/site-packages/nglview/widget.py in <module>
     17 import traitlets
     18 
---> 19 from . import color, interpolate
     20 from .adaptor import Structure, Trajectory
     21 from .component import ComponentViewer

~/anaconda3/envs/prolint/lib/python3.7/site-packages/nglview/color.py in <module>
    112 
    113 
--> 114 ColormakerRegistry = _ColormakerRegistry()

~/anaconda3/envs/prolint/lib/python3.7/site-packages/nglview/base.py in getinstance()
      8     def getinstance():
      9         if cls not in instances:
---> 10             instances[cls] = cls()
     11         return instances[cls]
     12     return getinstance

~/anaconda3/envs/prolint/lib/python3.7/site-packages/nglview/color.py in __init__(self, *args, **kwargs)
     45         try:
     46             get_ipython() # only display in notebook
---> 47             self._ipython_display_()
     48         except NameError:
     49             pass

~/anaconda3/envs/prolint/lib/python3.7/site-packages/nglview/color.py in _ipython_display_(self, **kwargs)
     52         if self._ready:
     53             return
---> 54         super()._ipython_display_(**kwargs)
     55 
     56     def __repr__(self):

AttributeError: 'super' object has no attribute '_ipython_display_'

I don't why this is happening. I am also very new to Jupyter. Help would be great!

ProLint / prolintpy

Attribute error while trying to import prolintpy #8