uib日期选择器弹出窗口不显示日历

我正在使用Express和AngularJS。我尝试添加一个带有ui引导模块的日期选择器。当我添加uib日期选择器时，它工作得很好。但当我尝试添加uib日期选择器弹出窗口时，结果就像一样

uib日期选择器弹出

当我点击日历按钮时，它会显示一个弹出窗口，但只有今天、清除和关闭按钮。它不显示日历。

这是我的html

<div ng-controller="DatepickerPopupDemoCtrl">
<pre>Selected date is: <em>{{dt | date:'fullDate' }}</em></pre>

  <div class="col-md-6">
    <p class="input-group">
      <input type="text" uib-datepicker-popup class="form-control" ng-model="dt" is-open="popup2.opened" datepicker-options="dateOptions" ng-required="true" close-text="Close" />
      <span class="input-group-btn">
        <button type="button" class="btn btn-default" ng-click="open2()"><i class="glyphicon glyphicon-calendar"></i></button>
      </span>
    </p>
  </div>
</div>

和控制器

app.controller('DatepickerPopupDemoCtrl', function ($scope) {

$scope.today = function() {
    $scope.dt = new Date();
  };
  $scope.today();
  $scope.clear = function() {
    $scope.dt = null;
  };
    $scope.toggleMin = function() {
    $scope.inlineOptions.minDate = $scope.inlineOptions.minDate ? null : new Date();
    $scope.dateOptions.minDate = $scope.inlineOptions.minDate;
  };

  $scope.inlineOptions = {
    customClass: getDayClass,
    minDate: new Date(),
    showWeeks: true
  };
  $scope.dateOptions = {
    dateDisabled: disabled,
    formatYear: 'yy',
    maxDate: new Date(2020, 5, 22),
    minDate: new Date(),
    startingDay: 1
  };
  // Disable weekend selection
  function disabled(data) {
    var date = data.date,
      mode = data.mode;
    return mode === 'day' && (date.getDay() === 0 || date.getDay() === 6);
  }
  $scope.toggleMin();
  $scope.open2 = function() {
    $scope.popup2.opened = !$scope.popup2.opened;
  };
  $scope.setDate = function(year, month, day) {
    $scope.dt = new Date(year, month, day);
  };
  $scope.format = 'yyyy-MM-dd';
  $scope.altInputFormats = ['M!/d!/yyyy'];
  $scope.popup2 = {
    opened: false
  };
  var tomorrow = new Date();
  tomorrow.setDate(tomorrow.getDate() + 1);
  var afterTomorrow = new Date();
  afterTomorrow.setDate(tomorrow.getDate() + 1);
  $scope.events = [
    {
      date: tomorrow,
      status: 'full'
    },
    {
      date: afterTomorrow,
      status: 'partially'
    }
  ];
  function getDayClass(data) {
    var date = data.date,
      mode = data.mode;
    if (mode === 'day') {
      var dayToCheck = new Date(date).setHours(0,0,0,0);
      for (var i = 0; i < $scope.events.length; i++) {
        var currentDay = new Date($scope.events[i].date).setHours(0,0,0,0);
        if (dayToCheck === currentDay) {
          return $scope.events[i].status;
        }
      }
    }
    return '';
  }
});

这是我取代码的文档：https://angular-ui.github.io/bootstrap/

提前谢谢。