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TypeError: 'type' object is not subscriptable

This error is observed when Python 3.8 is used instead of 3.9.

(env) C:\Users\cleong4\OneDrive - Schlumberger\OSDU\wellbore-ddms-las-loader\src>pipenv run python -m lascli fileload -h 
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'type' object is not subscriptable
Traceback (most recent call last):
  File "C:\Users\cleong4\OneDrive - Schlumberger\OSDU\wellbore-ddms-las-loader\env\lib\site-packages\knack\cli.py", line 231, in invoke
    cmd_result = self.invocation.execute(args)
  File "C:\Users\cleong4\OneDrive - Schlumberger\OSDU\wellbore-ddms-las-loader\env\lib\site-packages\knack\invocation.py", line 153, in execute
    parsed_args = self.parser.parse_args(args)
  File "C:\Users\cleong4\OneDrive - Schlumberger\OSDU\wellbore-ddms-las-loader\env\lib\site-packages\knack\parser.py", line 260, in parse_args
    return super().parse_args(args)
  File "C:\Python38\lib\argparse.py", line 1768, in parse_args
    args, argv = self.parse_known_args(args, namespace)
  File "C:\Python38\lib\argparse.py", line 1800, in parse_known_args
    namespace, args = self._parse_known_args(args, namespace)
  File "C:\Python38\lib\argparse.py", line 1988, in _parse_known_args
    positionals_end_index = consume_positionals(start_index)
  File "C:\Python38\lib\argparse.py", line 1965, in consume_positionals
    take_action(action, args)
  File "C:\Python38\lib\argparse.py", line 1874, in take_action
    action(self, namespace, argument_values, option_string)
  File "C:\Python38\lib\argparse.py", line 1159, in __call__
    subnamespace, arg_strings = parser.parse_known_args(arg_strings, None)
  File "C:\Python38\lib\argparse.py", line 1800, in parse_known_args
    namespace, args = self._parse_known_args(args, namespace)
  File "C:\Python38\lib\argparse.py", line 2006, in _parse_known_args
    start_index = consume_optional(start_index)
  File "C:\Python38\lib\argparse.py", line 1946, in consume_optional
    take_action(action, args, option_string)
  File "C:\Python38\lib\argparse.py", line 1874, in take_action
    action(self, namespace, argument_values, option_string)
  File "C:\Python38\lib\argparse.py", line 1044, in __call__
    parser.print_help()
  File "C:\Python38\lib\argparse.py", line 2494, in print_help
    self._print_message(self.format_help(), file)
  File "C:\Users\cleong4\OneDrive - Schlumberger\OSDU\wellbore-ddms-las-loader\env\lib\site-packages\knack\parser.py", line 247, in format_help
    self.cli_help.show_help(self.prog.split()[0],
  File "C:\Users\cleong4\OneDrive - Schlumberger\OSDU\wellbore-ddms-las-loader\env\lib\site-packages\knack\help.py", line 728, in show_help
    else self.group_help_cls(self, delimiters, parser)
  File "C:\Users\cleong4\OneDrive - Schlumberger\OSDU\wellbore-ddms-las-loader\env\lib\site-packages\knack\help.py", line 253, in __init__
    child.load(options)
  File "C:\Users\cleong4\OneDrive - Schlumberger\OSDU\wellbore-ddms-las-loader\env\lib\site-packages\knack\help.py", line 198, in load
    description = getattr(options, 'description', None)
  File "C:\Users\cleong4\OneDrive - Schlumberger\OSDU\wellbore-ddms-las-loader\env\lib\site-packages\knack\parser.py", line 240, in __getattribute__
    self.description = self._description() \
  File "C:\Users\cleong4\OneDrive - Schlumberger\OSDU\wellbore-ddms-las-loader\env\lib\site-packages\knack\commands.py", line 261, in description_loader
    return extract_full_summary_from_signature(CLICommandsLoader._get_op_handler(operation))
  File "C:\Users\cleong4\OneDrive - Schlumberger\OSDU\wellbore-ddms-las-loader\env\lib\site-packages\knack\commands.py", line 274, in _get_op_handler
    op = import_module(mod_to_import)
  File "C:\Python38\lib\importlib\__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1014, in _gcd_import
  File "<frozen importlib._bootstrap>", line 991, in _find_and_load
  File "<frozen importlib._bootstrap>", line 975, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 671, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 783, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "C:\Users\cleong4\OneDrive - Schlumberger\OSDU\wellbore-ddms-las-loader\src\lasloader\commands\file_load.py", line 5, in <module>
    from lasloader.file_loader import LasParser, LocalFileLoader
  File "C:\Users\cleong4\OneDrive - Schlumberger\OSDU\wellbore-ddms-las-loader\src\lasloader\file_loader.py", line 49, in <module>
    class JsonLoader:
  File "C:\Users\cleong4\OneDrive - Schlumberger\OSDU\wellbore-ddms-las-loader\src\lasloader\file_loader.py", line 57, in JsonLoader
    def load(self, path: str) -> dict[str, any]:
TypeError: 'type' object is not subscriptable