Clojurians Log v2

hm, does anyone know what might be causing this error?

> (require '[typed.clojure :as t])
nil
> (t/check-ns-cljs 'sketcherb.temp)
Execution error (AssertionError) at typed.cljc.checker.type-rep/Union-maker (type_rep.clj:110).
Assert failed: [#{nil false}]
(every? Type? types)
shadow.user=> (t/cns 'sketcherb.temp)
Execution error (AssertionError) at typed.cljc.checker.type-rep/Union-maker (type_rep.clj:110).
Assert failed: [#{nil false}]
(every? Type? types)