Object of type HTMLResponse is not JSON serializable

Hi, 
what the problem could it be?

- qwen3.6 35B/Gemma4 26B
- no errors in console.log
- settings:

<img width="901" height="119" alt="Image" src="https://github.com/user-attachments/assets/70d2a141-f88f-4ce8-b9af-477032ffd153" />



<img width="1282" height="389" alt="Image" src="https://github.com/user-attachments/assets/c723b9a8-67f4-4e0b-a266-29eaa7fea2e5" />
