Problem (one or two sentences)

Running into an API error when using the Web Browser Tool with Vision Capable model via LM Studio.
Getting the following error in the LM Studio logs: [Server Error] 'url' field must be a base64 encoded image

Context (who is affected and when)

Once the web browser loads the site in the Roo panel, it displays an API error, and then in the LM Studio log I can see: [Server Error] 'url' field must be a base64 encoded image

Reproduction steps

Latest version of LM Studio, latest version of MLX engine with support for Qwen3 vision models.
Have been able to reproduce this with Qwen3-VL-30b, Qwen3-VL-4b, and Gemma3-27b.

In code mode, I ask to check whether a website is rendering properly.

The browser tool activates, but then unable to do anything as it has an API error.

Expected result

No errors from API request in LM Studio log

Actual result

Error in LM Studio log: [Server Error] 'url' field must be a base64 encoded image

Variations tried (optional)

No response

App Version

3.29.0

API Provider (optional)

LM Studio

Model Used (optional)

Qwen3-VL-30b

Roo Code Task Links (optional)

No response

Relevant logs or errors (optional)

LMStudio: [Server Error] 'url' field must be a base64 encoded image