Underscore.js errors

myapp.js

MYAPP = {

  fetchTemplate: function(path, done) {
    window.JST = window.JST || {};

    // Should be an instant synchronous way of getting the template, if it
    // exists in the JST object.
    if (JST[path]) {
      return done(JST[path]);
    }

    // Fetch it asynchronously if not available from JST
    return $.get(path, function(contents) {
      var tmpl = _.template(contents);
      JST[path] = tmpl;

      done(tmpl);
    });
  }

};

some-other-js.js

SomeView = Backbone.View.extend({
  id: "temp-test",
  template: "template.html",

  render: function(){
    var self = this;

    MYAPP.fetchTemplate(this.template, function(tmpl){
      self.$el.html(tmpl());

      if (_.isFunction(done)){
        done(self.el);
      }
    }
  }
};

template.html

<section class="benefits index">

  <img id="temp" src="assets/img/benefits-main.png" />

</section>