walnut_launchpad.html/templates/widgets/website-notification-bar.html

<div class="error-notice">
  <div class="oaerror {{ vm.alertNotification.className }} {{ vm.alertNotification.hidden }}">
    <strong>{{ vm.alertNotification.title }}</strong> - {{ vm.alertNotification.message }}
    <button type="button" class="close" ng-click="vm.alertNotification.hidden = 'hidden'"><span aria-hidden="true">×</span><span class="sr-only">Close</span></button>
  </div>
</div>