Invalid or missing parameter: Expected an object for 'messages[2].tool_calls[0].function', but encountered an incorrect type or missing value.

To fix the "Invalid type for 'messages.tool_calls.function': expected an object, but got a string instead" error in the OpenAI API, you need to ensure that the function parameter is correctly formatted as an object. Here are the key steps to take:

• Ensure the function parameter is an object with the required fields, such as name and any other necessary attributes.

• Verify that the object is properly structured and passed in the tool_calls array.

• Check that there are no typos or misconfigurations in the request payload.

Here are some key points to consider:

• Use an object format for the function parameter.

• Include all mandatory fields within the function object.

• Double-check the overall structure of the request payload to ensure it matches the API's expectations.