使用ezgmail发送邮件遇AttributeError: 'bool'无encode属性求助

使用ezgmail发送自动化邮件时，email_policybase.py抛出了AttributeError错误，调用代码如下：

ezgmail.send('sender@gmail.com', 'test', 'test')

完整报错栈信息：

Traceback (most recent call last):
  File "c:\Automation\mailer.py", line 3, in <module>
    ezgmail.send('sender@gmail.com', 'test', 'test')
  File "C:\Program Files\Python311\Lib\site-packages\ezgmail\__init__.py", line 603, in send
    msg = _createMessage(sender, recipient, subject, body, cc, bcc, mimeSubtype, _threadId=_threadId) 
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ 
  File "C:\Program Files\Python311\Lib\site-packages\ezgmail\__init__.py", line 499, in _createMessage
    rawMessage = {"raw": base64.urlsafe_b64encode(message.as_bytes()).decode("ascii")}
                                                  ^^^^^^^^^^^^^^^^^^
  File "C:\Program Files\Python311\Lib\email\message.py", line 208, in as_bytes
    g.flatten(self, unixfrom=unixfrom)
  File "C:\Program Files\Python311\Lib\email\generator.py", line 116, in flatten
    self._write(msg)
  File "C:\Program Files\Python311\Lib\email\generator.py", line 199, in _write
    self._write_headers(msg)
  File "C:\Program Files\Python311\Lib\email\generator.py", line 422, in _write_headers
    self._fp.write(self.policy.fold_binary(h, v))
                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Program Files\Python311\Lib\email\_policybase.py", line 337, in fold_binary
    folded = self._fold(name, value, sanitize=self.cte_type=='7bit')
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Program Files\Python311\Lib\email\_policybase.py", line 369, in _fold
    parts.append(h.encode(linesep=self.linesep, maxlinelen=maxlinelen))
                 ^^^^^^^^
AttributeError: 'bool' object has no attribute 'encode'

我在_policybase.py中添加了打印语句，输出h的值和类型如下：

1.0 || <class 'email.header.Header'>
7bit || <class 'email.header.Header'>
sender@gmail.com || <class 'email.header.Header'>
False || <class 'bool'>

尝试将h强制转换为header.Header对象后，出现新的AttributeError：

Traceback (most recent call last):
  File "c:\Automation\mailer.py", line 3, in <module>
    ezgmail.send('sender@gmail.com', 'test', 'test')
  File "C:\Program Files\Python311\Lib\site-packages\ezgmail\__init__.py", line 603, in send
    msg = _createMessage(sender, recipient, subject, body, cc, bcc, mimeSubtype, _threadId=_threadId) 
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ 
  File "C:\Program Files\Python311\Lib\site-packages\ezgmail\__init__.py", line 499, in _createMessage
    rawMessage = {"raw": base64.urlsafe_b64encode(message.as_bytes()).decode("ascii")}
                                                  ^^^^^^^^^^^^^^^^^^
  File "C:\Program Files\Python311\Lib\email\message.py", line 208, in as_bytes
    g.flatten(self, unixfrom=unixfrom)
  File "C:\Program Files\Python311\Lib\email\generator.py", line 116, in flatten
    self._write(msg)
  File "C:\Program Files\Python311\Lib\email\generator.py", line 199, in _write
    self._write_headers(msg)
  File "C:\Program Files\Python311\Lib\email\generator.py", line 422, in _write_headers
    self._fp.write(self.policy.fold_binary(h, v))
                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Program Files\Python311\Lib\email\_policybase.py", line 337, in fold_binary
    folded = self._fold(name, value, sanitize=self.cte_type=='7bit')
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Program Files\Python311\Lib\email\_policybase.py", line 371, in _fold
    header.Header(h)
  File "C:\Program Files\Python311\Lib\email\header.py", line 217, in __init__
    self.append(s, charset, errors)
  File "C:\Program Files\Python311\Lib\email\header.py", line 295, in append
    s = s.decode(input_charset, errors)
        ^^^^^^^^
AttributeError: 'bool' object has no attribute 'decode'

恳请各位提供解决思路！

内容的提问来源于stack exchange，提问作者Jordan Douglas