I am untilizing Langchain with LLamaIndex, I am having issues with the agent. Firstly, when I create a chat_agent, I am getting a output-parse error. I know exactly why it is throwing the error but I have no idea why the output from the llm is in that format. Creating just the agent fixes this but when It comes to querying multiple document it is not returning the other documents. Does anyone have an idea as what is wrong?