Figured it out. The machine in question had a HOST environment variable set to “127.0.0.1:3000” for historical reasons.

Hi. I'm trying to get the picture gallery example app working (from the book web development in clojure) . Unfortunatley i get in the browser console: "Error: Assert failed: Invalid Hiccup form: [nil] (in page)". The stackdump is not of any help, more than that the problem probably accour in reagent. Anyone who have experience with this error? How can i find the faulty component?