Add Student Card

Warning (2): Undefined array key "Role" [APP/Plugin/Iot/View/IotStudentCards/create.ctp, line 271]
Code Context
                                <a class="btn btn-default" href="<?php echo $this->request->base.'/iot/student-card/dashboard/manager' ?>"><?php echo __d('iot','Cancel') ?></a>



                                <?php if ( (!empty($card['IotCard']['id']) && $cuser['Role']['is_admin'] )): ?>
include - APP/Plugin/Iot/View/IotStudentCards/create.ctp, line 271
View::_evaluate() - CORE/Cake/View/View.php, line 971
View::_render() - CORE/Cake/View/View.php, line 933
View::render() - CORE/Cake/View/View.php, line 473
MooView::render() - APP/View/MooView.php, line 807
Controller::render() - CORE/Cake/Controller/Controller.php, line 973
AppController::render() - APP/Controller/AppController.php, line 1148
Dispatcher::_invoke() - CORE/Cake/Routing/Dispatcher.php, line 200
Dispatcher::dispatch() - CORE/Cake/Routing/Dispatcher.php, line 167
[main] - APP/webroot/index.php, line 80

Warning (2): Trying to access array offset on value of type null [APP/Plugin/Iot/View/IotStudentCards/create.ctp, line 271]
Code Context
                                <a class="btn btn-default" href="<?php echo $this->request->base.'/iot/student-card/dashboard/manager' ?>"><?php echo __d('iot','Cancel') ?></a>



                                <?php if ( (!empty($card['IotCard']['id']) && $cuser['Role']['is_admin'] )): ?>
include - APP/Plugin/Iot/View/IotStudentCards/create.ctp, line 271
View::_evaluate() - CORE/Cake/View/View.php, line 971
View::_render() - CORE/Cake/View/View.php, line 933
View::render() - CORE/Cake/View/View.php, line 473
MooView::render() - APP/View/MooView.php, line 807
Controller::render() - CORE/Cake/Controller/Controller.php, line 973
AppController::render() - APP/Controller/AppController.php, line 1148
Dispatcher::_invoke() - CORE/Cake/Routing/Dispatcher.php, line 200
Dispatcher::dispatch() - CORE/Cake/Routing/Dispatcher.php, line 167
[main] - APP/webroot/index.php, line 80