[Bug]: Llama Index model throws Connection error when queried

[martyna-mindsdb]

Short description of current behavior

Created Llama Index model in conversational mode:

CREATE ML_ENGINE llama_index_engine2 FROM llama_index;

  CREATE MODEL chatbot_agent_2_test
    PREDICT answer
    USING
    engine = 'llama_index_engine2',
    input_column = 'question',
    openai_api_key='xxx',
    mode = 'conversational',
    user_column = 'question' ,
    assistant_column = 'answer';

Querying the model:

SELECT question, answer
FROM chatbot_agent_2_test
WHERE question='how are you?';

This model throws an error when querying it:

Video or screenshots

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Expected behavior

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How to reproduce the error

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Anything else?

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