How do I check that Ollama is working with BookyAI?

Open Settings, choose the Ollama engine and press "Test" under the Ollama settings. From version 1.9.21 the Test button is there for Ollama too, as the Ollama guide describes. It tells you clearly when Ollama is not running (start the Ollama app first) or when it is running but has no model installed yet (download a model, then test again). When everything works, your installed models appear in the "Ollama model" list.