Invalid schema detected for function due to missing array items in the specified properties context.

The 400 status error in the Azure OpenAI API with the message "Invalid schema for function 'guidance_web_qna': In context=('properties', 'query_variations'), array schema missing items" is likely due to the following reasons:

• Incorrect or Missing Schema: The request payload does not conform to the expected JSON schema. Specifically, the query_variations field, which is expected to be an array, is either missing the required items array schema or does not match the expected data structure[4 ".

• Invalid Request Payload: The payload you are sending contains incorrect formatting, missing required fields, or uses unrecognized request arguments, leading to a schema validation error.

• Model-Specific Parameter Requirements: The error could also stem from using parameters that do not match the specific requirements of the guidance_web_qna function, such as incorrect data types or missing mandatory fields.