Clojurians Log v2

Hi! I'm very new to Clerk so I apologize if I'm just missing something very basic, but when I view https://github.clerk.garden/nextjournal/clerk-demo/commit/cb212b2edc64e762bcd1af56417ef9f6b2fde5b1/notebooks/semantic.html in my browser following the link from Clerk Vision, the arrowic graph at the bottom looks totally fine; but, when I show! semantic.clj (from the clerk-demo) to my browser locally, the graph at the bottom does not render & and I get Unhandled clojure.lang.ExceptionInfo Execution error (NullPointerException) at arrowic.core/as-svg (core.clj:84). Cannot invoke "Object.getClass()" because "target" is null I'm wondering if I have something set up incorrectly, and I would appreciate any insight or advice! I'm doing this in VSCodium + Calva fwiw.