<span class="help-block" ng-show="company_bundle_task.company_bundle_task[timeStart][date].$invalid">Required</span>

<span class="help-block" ng-show="company_bundle_task.company_bundle_task[timeStart][date].$error.required">Required</span>

<span class="help-block" ng-show="company_bundle_task['company_bundle_task[timeStart][date]'].$error.required">Required</span>