AttributeError: 'NoneType' object has no attribute 'nodes'

[beatG123]

threr are some prombles when using process_response and convert_to_graph_documents: AttributeError: 'NoneType' object has no attribute 'nodes' in llm=ChatOpenAI(model_name="gpt-3.5-turbo-0125") # gpt-4-0125-preview occasionally has issues llm_transformer = LLMGraphTransformer(llm=llm) document = Document(page_content="Elon Musk is suing OpenAI") print(document) graph_document = llm_transformer.process_response(document) and llm=ChatOpenAI(model_name="gpt-3.5-turbo-0125") # gpt-4-0125-preview occasionally has issues llm_transformer = LLMGraphTransformer(llm=llm) document = Document(page_content="Elon Musk is suing OpenAI") print(document) graph_documents = llm_transformer.convert_to_graph_documents([document]) graph.add_graph_documents( graph_documents, baseEntityLabel=True, include_source=True ) who can help me?