@mgirdwood with Ollama and qwen3:8b there seems to be an answer given when modifying the example you mentioned (02 Multimodal prompting).
You will have to download the rest of the workflow group, install Ollama, expose this to the network and
ollama pull qwen3:8b
02 Multimodal prompting.knwf (140.4 KB)
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Medium: Multimodal Prompting with local LLMs using KNIME and Ollama