Invalid type for 'messages[*].content[*].image_url.url': expected a base64-encoded data URL, but got a different type instead.

The error you are encountering, "Invalid type for 'messages.content.image_url': expected an object, but got a string instead," is likely due to a mismatch between the expected data type and the actual data type in your request.

In the context of the Azure OpenAI API, the messages field expects a specific structure for its content. If image_url is expected to be an object but you are providing a string, it violates the API's schema requirements, leading to a "Bad Request" (400) error.

This issue is similar to the problems described in other scenarios where incorrect data types or invalid request parameters cause the API to reject the request.