I keep getting the error

[MRDOGHOG]

HttpRequestException: Error at chat/completions (https://api.openai.com/v1/chat/completions) with HTTP status code: BadRequest. Content:

<title>400 Bad Request</title>

400 Bad Request

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cloudflare My Code is from https://www.immersivelimit.com/tutorials/how-to-use-chatgpt-in-unity, and I'm using Version 1.6. How to fix?

[MRDOGHOG]

HttpRequestException: Error at chat/completions (https://api.openai.com/v1/chat/completions) with HTTP status code: BadRequest. Content:

[MRDOGHOG]

If I use version 1.11 I get the error:
Assets\ThirdParty\OkGoDoIt\OpenAI_API\OpenAIAPI.cs(38,10): error CS0246: The type or namespace name 'IHttpClientFactory' could not be found (are you missing a using directive or an assembly reference?)