runtime error

Exit code: 1. Reason: /home/user/app/app.py:8: UserWarning: Importing LLMChain from langchain root module is no longer supported. Please use langchain.chains.LLMChain instead. from langchain import LLMChain, PromptTemplate /home/user/app/app.py:8: UserWarning: Importing PromptTemplate from langchain root module is no longer supported. Please use langchain_core.prompts.PromptTemplate instead. from langchain import LLMChain, PromptTemplate /home/user/app/app.py:28: LangChainDeprecationWarning: Please see the migration guide at: https://python.langchain.com/docs/versions/migrating_memory/ memory = ConversationBufferMemory(memory_key="chat_history") /home/user/app/app.py:31: LangChainDeprecationWarning: The class `ChatOpenAI` was deprecated in LangChain 0.0.10 and will be removed in 1.0. An updated version of the class exists in the :class:`~langchain-openai package and should be used instead. To use it run `pip install -U :class:`~langchain-openai` and import as `from :class:`~langchain_openai import ChatOpenAI``. llm=ChatOpenAI(temperature='0.5', model_name="gpt-3.5-turbo"), /home/user/app/app.py:30: LangChainDeprecationWarning: The class `LLMChain` was deprecated in LangChain 0.1.17 and will be removed in 1.0. Use :meth:`~RunnableSequence, e.g., `prompt | llm`` instead. llm_chain = LLMChain( Traceback (most recent call last): File "/home/user/app/app.py", line 40, in <module> "AUTHORIZATION": "Bearer "+ PLAY_HT_API_KEY, TypeError: can only concatenate str (not "NoneType") to str

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