Gemini-2.5-flash-preview-09-2025 : “API request failed with status 401“

I use the model **gemini-2.5-flash-preview-09-2025 in my canvas apps. Now its not working anymore. Since yesterday(2026/03/06), I kept receiving the following response: “API request failed with status 401“.

I try to switch to other models , but still not working.

Can anyone help me?**

I am having the same problem. Code that was working perfectly until this morning that relies on image generation via Imagen suddenly started spitting 401 errors. I’m not using any personal API keys, just my pro account and the code in Canvas was doing its own thing by calling the Imagen API. Help!

Not only image generation , but also text output has the same problem !

Devs, is there a replacement model for usage without api key in canvas?