codex 突然无法使用，请教大佬们

unexpected status 404 Not Found: The model gpt-5.5 does not exist or you do not have access to it., url: https://chatgpt.com/backend-api/codex/responses, cf-ray: a37ad7dcfd0c11f6-NRT

最近频繁出现这个错误，刚刚还好好的，什么都没动，为什么突然不行啦？