TypeError: object of type 'NoneType' has no len()

[awarenessaspie]

Traceback (most recent call last):
File "C:\Users\hawke\JailbreakingLLMs\main.py", line 188, in
main(args)
File "C:\Users\hawke\JailbreakingLLMs\main.py", line 38, in main
extracted_attack_list = attackLM.get_attack(convs_list, processed_response_list)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\hawke\JailbreakingLLMs\conversers.py", line 86, in get_attack
full_prompts.append(conv.get_prompt()[:-len(conv.sep2)])
^^^^^^^^^^^^^^
TypeError: object of type 'NoneType' has no len()

I encounter this error. What should I do?

[dirtycomputer]

same question

[dirtycomputer]

extracted_attack_list = [attack for attack in extracted_attack_list if attack is not None]