Please upgrade ollama to at least v0.11.2

Because the current release of bundled ollama contains a bug https://github.com/open-webui/open-webui/issues/16311

Or may be reproduced locally via cli:

<img width="957" height="201" alt="Image" src="https://github.com/user-attachments/assets/061dc0c4-a4a6-4a50-9ba3-5e90f51dafb4" />