SystemError starting at 5.12.1

Traceback (most recent call last):
  File "pyscript", line 23, in bootstrap
FileNotFoundError: [Errno 2] No such file or directory: 'D:\\support\\signature\\loader.py'
AttributeError: module 'signature_loader' has no attribute 'pyside_type_init'
SystemError: could not initialize part 2The above exception was the direct cause of the following exception:Traceback (most recent call last):
  File "C:\Program Files\Python36\lib\site-packages\cx_Freeze\initscripts\__startup__.py", line 14, in run
    module.run()
  File "C:\Program Files\Python36\lib\site-packages\cx_Freeze\initscripts\Console.py", line 26, in run
    exec(code, m.__dict__)
  File "main.py", line 20, in <module>
  File "<frozen importlib._bootstrap>", line 971, in _find_and_load
  File "<frozen importlib._bootstrap>", line 955, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 656, in _load_unlocked
  File "<frozen importlib._bootstrap>", line 626, in _load_backward_compatible
  File ".\__init__.py", line 1, in <module>
    import calendar
  File "<frozen importlib._bootstrap>", line 971, in _find_and_load
  File "<frozen importlib._bootstrap>", line 955, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 656, in _load_unlocked
  File "<frozen importlib._bootstrap>", line 626, in _load_backward_compatible
  File "C:\Program Files\Python36\lib\calendar.py", line 10, in <module>
    import locale as _locale
  File "<frozen importlib._bootstrap>", line 971, in _find_and_load
  File "<frozen importlib._bootstrap>", line 955, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 656, in _load_unlocked
  File "<frozen importlib._bootstrap>", line 626, in _load_backward_compatible
  File "C:\Program Files\Python36\lib\locale.py", line 108, in <module>
    @functools.wraps(_localeconv)
  File "C:\Program Files\Python36\lib\functools.py", line 61, in update_wrapper
    value = getattr(wrapped, attr)
SystemError: <method-wrapper '__get__' of getset_descriptor object at 0x000002974354E708> returned a result with an error set