> unexpected status 404 Not Found: Unknown error, url: https://chatgpt.com/backend-api/codex/responses, cf-ray: a35599f1d691400a-STL

pretty sure cf-ray is cloudflare, but I think it just means the origin is 404ing

That sounds like Cloudflare indeed (or an API copy of same!)

I seem to recall they all in some way use Azure, and Azure is infamously crappy in lots of ways, so I'll place my 5 cents on Azure shitting the bed somehow.