Apple Intelligence not working on Mac Mini M4, Sequoia 15.3.2
I'm using a Mac Mini M4 with sequoia 15.3.2. I have Apple Intelligence and Siri switched on in the settings, language set to English (UK) in the Language and Region setting and the Siri setting, and I'm logged in to my apple account. Unfortunately, the Image Playground app is not installed and Siri is not giving any AI in its answers, just search results. Do you have any suggestions to get Apple Intelligence working? Thanks.
Mac mini, macOS 15.3