clone-for issue "TypeError: enfocus.core.last_element_child is undefined"

I have html template

<html>
  <head>
      <script src="js/main.js"></script>
  </head>
  <body>
      <div id="container">
      </div>
      <div id="templates" style="display:none">
        <p>[templates]</p>
        <div id="main-block">
            <div id="clist">[container]</div>
        </div>
        <ul id="lllist">
            <li>e1</li>
            <li>e2</li>
            <li>e3</li>
        </ul>
      </div>
  </body>
</html>

also have core.cljs

(ns suopelmen.client.core
  (:require
   [ajax.core :as ajax]
   [enfocus.core :as ef]
   [enfocus.events :as ev])
  (:require-macros
   [enfocus.macros :as em]))

(em/defsnippet userlist-block "/t2.html" ["#lllist"]
  []
  "li ~ li" (ef/remove-node)
  "li:first-child" (em/clone-for [user [{:id 1 :name "adfgadf"}
                                        {:id 2 :name "qertqert"}
                                        {:id 3 :name "pouiyi"}]]
                                   (ef/content (name user))))

(em/defsnippet main-block "/t2.html" ["#main-block"]
  []
  "#clist" (ef/content "")
  "#clist" (ef/content (userlist-block)))

(defn init []
  (ef/at "#container" (main-block)))

(set! (.-onload js/window) #(em/wait-for-load (init)))

But in that example clone-for doesn't work as I await from him. In javascript console I see message "TypeError: enfocus.core.last_element_child is undefined". And in fact it doesn't present in main.js. Whats wrong in my template or cljs?

ckirkendall / enfocus

clone-for issue "TypeError: enfocus.core.last_element_child is undefined" #98