Cannot set property 'date' of undefined when setting up AngularJS UI Bootstrap Datepicker

Please consider this Plunk.

I have this code to set up the datepicker (basically a (very minorly modified) verbatim copy paste from UI Bootstrap).

I don't need all of the provided functionality, so it's stripped down a bit.

<div class="input-group">
  <input type="text"
         class="form-control"
         uib-datepicker-popup="{{format}}"
         ng-model="today"
         is-open="status.opened"
         min-date="minDate"
         max-date="maxDate"
         datepicker-options="dateOptions"
         ng-required="true" 
         close-text="Close" />
  <span class="input-group-btn">
      <button type="button" 
      class="btn btn-default" 
      ng-click="open($event)">
        <i class="fa fa-calendar"></i>
      </button>
  </span>
</div>

With this defined in the controller:

app.controller("myController", [
      "$scope",
      "$http",
      function($scope, $http){
        var self = {};

        $scope.today = new Date();

        $scope.status = {
            opened: false
        };

        $scope.open = function ($event) {
            $scope.status.opened = true;
        };

        $scope.dateFormat = "dd/mm/yyyy";
    }]);

When running the Plunk, that results in the following error in console (Chrome F12):

TypeError: Cannot set property 'date' of undefined

See further below for the full message.

As far as I can tell, this property date is not something I'm setting, so it must be something going wrong with the innerworkings of the DatePicker.

Any idea how to fix this?

Full error as promised, looks better when viewed in the Plunk though.

TypeError: Cannot set property 'date' of undefined at init (https://angular-ui.github.io/bootstrap/ui-bootstrap-tpls-0.14.3.min.js:9:3230) at link (https://angular-ui.github.io/bootstrap/ui-bootstrap-tpls-0.14.3.min.js:9:4936) at http://ajax.googleapis.com/ajax/libs/angularjs/1.2.6/angular.min.js:58:185 at W (http://ajax.googleapis.com/ajax/libs/angularjs/1.2.6/angular.min.js:49:141) at f (http://ajax.googleapis.com/ajax/libs/angularjs/1.2.6/angular.min.js:42:268) at f (http://ajax.googleapis.com/ajax/libs/angularjs/1.2.6/angular.min.js:42:285) at W (http://ajax.googleapis.com/ajax/libs/angularjs/1.2.6/angular.min.js:49:82) at f (http://ajax.googleapis.com/ajax/libs/angularjs/1.2.6/angular.min.js:42:268) at f (http://ajax.googleapis.com/ajax/libs/angularjs/1.2.6/angular.min.js:42:285) at http://ajax.googleapis.com/ajax/libs/angularjs/1.2.6/angular.min.js:41:459 (anonymous function) @ angular.js:9383(anonymous function) @ angular.js:6825W @ angular.js:6215f @ angular.js:5622f @ angular.js:5625W @ angular.js:6206f @ angular.js:5622f @ angular.js:5625(anonymous function) @ angular.js:5527(anonymous function) @ angular.js:1301h.$eval @ angular.js:11906h.$apply @ angular.js:12006(anonymous function) @ angular.js:1299d @ angular.js:3697Xb.c @ angular.js:1297Xb @ angular.js:1311Rc @ angular.js:1260(anonymous function) @ angular.js:20534a @ angular.js:2339(anonymous function) @ angular.js:2610q @ angular.js:309Xc.c @ angular.js:2609