请问运行openai_agent_module.py时报如下错误该如何解决？

[lltttty22]

File "pydantic\main.py", line 341, in pydantic.main.BaseModel.init
pydantic.error_wrappers.ValidationError: 1 validation error for ConversationalChatAgent
output_parser
Can't instantiate abstract class AgentOutputParser with abstract method parse (type=type_error)

[gzlwz]

pip install pydantic==1.7.4

[Ca1iber]

请问问题解决了吗