AttributeError: type object 'NgSpiceShared' has no attribute 'new_instance'

good afternoon community among my adventure to simulate an example of the pyspice module I ran into the following error:
---------------------------------------------------------------------------

AttributeError                            Traceback (most recent call last)

<ipython-input-12-475d4280ae1b> in <module>()
----> 1 simulator = circuit.simulator(temperature=25, nominal_temperature=25)
      2 analysis = simulator.ac(start_frequency=1@u_Hz, stop_frequency=1@u_MHz, number_of_points=10,  variation='dec')

2 frames

/usr/local/lib/python3.6/dist-packages/PySpice/Spice/NgSpice/Simulation.py in __init__(self, circuit, **kwargs)
     97         ngspice_shared = kwargs.get('ngspice_shared', None)
     98         if ngspice_shared is None:
---> 99             self._ngspice_shared = NgSpiceShared.new_instance()
    100         else:
    101             self._ngspice_shared = ngspice_shared

AttributeError: type object 'NgSpiceShared' has no attribute 'new_instance

the example link is as follows
https://pyspice.fabrice-salvaire.fr/examples/filter/low-pass-rc-filter.html
the characteristic of my environment are the following
ubuntu 18.04, python 3.6.2, pyscpice 1.4.2
To clarify I am a student of electrical engineering and I am just getting into this world of computer science, thank you very much for your help

v1.4.3 has a tool to debug installation but still fighting on some issues …

pyspice-post-installation --check