Trace error

C:\Users\Donovan\PycharmProjects\untitled1\venv\Scripts\python.exe C:/Users/Donovan/PycharmProjects/untitled1/venv/hitch2.0.py
C:\Users\Donovan\PycharmProjects\untitled1\venv\lib\site-packages\telegram\ext\conversationhandler.py:217: UserWarning: If 'per_message=False', 'CallbackQueryHandler' will not be tracked for every message.
  warnings.warn("If 'per_message=False', 'CallbackQueryHandler' will not be "
2020-01-28 21:39:29,142 - __main__ - INFO - User Donovan started the conversation.
2020-01-28 21:39:33,467 - telegram.ext.dispatcher - ERROR - No error handlers are registered, logging exception.
Traceback (most recent call last):
  File "C:\Users\Donovan\PycharmProjects\untitled1\venv\lib\site-packages\telegram\ext\dispatcher.py", line 372, in process_update
    handler.handle_update(update, self, check, context)
  File "C:\Users\Donovan\PycharmProjects\untitled1\venv\lib\site-packages\telegram\ext\conversationhandler.py", line 355, in handle_update
    new_state = handler.handle_update(update, dispatcher, check_result, context)
  File "C:\Users\Donovan\PycharmProjects\untitled1\venv\lib\site-packages\telegram\ext\handler.py", line 117, in handle_update
    return self.callback(update, context)
  File "C:/Users/Donovan/PycharmProjects/untitled1/venv/hitch2.0.py", line 148, in name_handler
    "\nName: " + get_data(chat_id, "message_text"),
TypeError: must be str, not NoneType