TypeError: ("'NoneType' object is not iterable", 'occurred at index 13ece079741148e2'

[haqthat]

Connects to gmail, collects mail metadata, then traceback.

C:\Users\Admin\AppData\Roaming\Python\Python38\Scripts>mail-sanitizer.exe sanitize
Traceback (most recent call last):
  File "c:\users\admin\appdata\local\programs\python\python38-32\lib\runpy.py", line 192, in _run_module_as_main
    return _run_code(code, main_globals, None,
  File "c:\users\admin\appdata\local\programs\python\python38-32\lib\runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "C:\Users\Admin\AppData\Roaming\Python\Python38\Scripts\mail-sanitizer.exe\__main__.py", line 9, in <module>
  File "C:\Users\Admin\AppData\Roaming\Python\Python38\site-packages\mail_sanitizer\main.py", line 33, in main
    cli()
  File "C:\Users\Admin\AppData\Roaming\Python\Python38\site-packages\click\core.py", line 764, in __call__
    return self.main(*args, **kwargs)
  File "C:\Users\Admin\AppData\Roaming\Python\Python38\site-packages\click\core.py", line 717, in main
    rv = self.invoke(ctx)
  File "C:\Users\Admin\AppData\Roaming\Python\Python38\site-packages\click\core.py", line 1137, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "C:\Users\Admin\AppData\Roaming\Python\Python38\site-packages\click\core.py", line 956, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "C:\Users\Admin\AppData\Roaming\Python\Python38\site-packages\click\core.py", line 555, in invoke
    return callback(*args, **kwargs)
  File "C:\Users\Admin\AppData\Roaming\Python\Python38\site-packages\mail_sanitizer\main.py", line 19, in sanitize
    mail_dump_ops = MailDumpOps()
  File "C:\Users\Admin\AppData\Roaming\Python\Python38\site-packages\mail_sanitizer\mail_dump_ops.py", line 58, in __init__
    self.df['from_sender'] = self.df.apply(MailDumpOps.get_from_sender, axis=1)
  File "C:\Users\Admin\AppData\Roaming\Python\Python38\site-packages\pandas\core\frame.py", line 6928, in apply
    return op.get_result()
  File "C:\Users\Admin\AppData\Roaming\Python\Python38\site-packages\pandas\core\apply.py", line 186, in get_result
    return self.apply_standard()
  File "C:\Users\Admin\AppData\Roaming\Python\Python38\site-packages\pandas\core\apply.py", line 292, in apply_standard
    self.apply_series_generator()
  File "C:\Users\Admin\AppData\Roaming\Python\Python38\site-packages\pandas\core\apply.py", line 321, in apply_series_generator
    results[i] = self.f(v)
  File "C:\Users\Admin\AppData\Roaming\Python\Python38\site-packages\mail_sanitizer\mail_dump_ops.py", line 74, in get_from_sender
    return MailDumpOps.get_header_val(row, 'From')
  File "C:\Users\Admin\AppData\Roaming\Python\Python38\site-packages\mail_sanitizer\mail_dump_ops.py", line 88, in get_header_val
    filtered_from_sender = list(filter(lambda x: x['name'] == header_key, headers))
TypeError: ("'NoneType' object is not iterable", 'occurred at index 13ece079741148e2')```