More likely that error handling is not well implemented - i.e Either backend is not throwing the equivalent of 429/402 errors or the gateway is not handling the errors well and returns this message even though a 429 is being thrown.

This sort of thing keeps me skeptical of AI quite a bit. ChatGPT also has non sensical errors messages for random failures, Gemini too. These companies have infinite compute and yet they haven't been able to implement reliable/graceful error handling in 2+ years for a chat app? Why are they promising us they can replace all developers?