500 Internal Server Error

Undefined index: email (8)

#0 /home1/toplock2/public_html/App/helpers.php(257): flight\Engine->handleError(8, 'Undefined index...', '/home1/toplock2...', 257, Array)
#1 /home1/toplock2/public_html/App/helpers.php(150): sendEmail(Array, true)
#2 /home1/toplock2/public_html/App/controllers/AppController.php(218): logEvent('404')
#3 /home1/toplock2/public_html/vendor/mikecao/flight/flight/core/Dispatcher.php(197): AppController::notFound()
#4 /home1/toplock2/public_html/vendor/mikecao/flight/flight/core/Dispatcher.php(142): flight\core\Dispatcher::invokeMethod(Array, Array)
#5 /home1/toplock2/public_html/vendor/mikecao/flight/flight/core/Dispatcher.php(48): flight\core\Dispatcher::execute(Array, Array)
#6 /home1/toplock2/public_html/vendor/mikecao/flight/flight/Engine.php(65): flight\core\Dispatcher->run('notFound', Array)
#7 /home1/toplock2/public_html/vendor/mikecao/flight/flight/core/Dispatcher.php(196): flight\Engine->__call('notFound', Array)
#8 /home1/toplock2/public_html/vendor/mikecao/flight/flight/Flight.php(77): flight\core\Dispatcher::invokeMethod(Array, Array)
#9 /home1/toplock2/public_html/App/helpers.php(52): Flight::__callStatic('notFound', Array)
#10 /home1/toplock2/public_html/App/controllers/AppController.php(25): showView('24-hour-locksmi...', Array, NULL)
#11 /home1/toplock2/public_html/vendor/mikecao/flight/flight/core/Dispatcher.php(205): AppController::getView('24-hour-locksmi...', NULL)
#12 /home1/toplock2/public_html/vendor/mikecao/flight/flight/core/Dispatcher.php(142): flight\core\Dispatcher::invokeMethod(Array, Array)
#13 /home1/toplock2/public_html/vendor/mikecao/flight/flight/Engine.php(323): flight\core\Dispatcher::execute(Array, Array)
#14 /home1/toplock2/public_html/vendor/mikecao/flight/flight/core/Dispatcher.php(196): flight\Engine->_start()
#15 /home1/toplock2/public_html/vendor/mikecao/flight/flight/core/Dispatcher.php(142): flight\core\Dispatcher::invokeMethod(Array, Array)
#16 /home1/toplock2/public_html/vendor/mikecao/flight/flight/core/Dispatcher.php(48): flight\core\Dispatcher::execute(Array, Array)
#17 /home1/toplock2/public_html/vendor/mikecao/flight/flight/Engine.php(65): flight\core\Dispatcher->run('start', Array)
#18 /home1/toplock2/public_html/vendor/mikecao/flight/flight/core/Dispatcher.php(196): flight\Engine->__call('start', Array)
#19 /home1/toplock2/public_html/vendor/mikecao/flight/flight/Flight.php(77): flight\core\Dispatcher::invokeMethod(Array, Array)
#20 /home1/toplock2/public_html/index.php(11): Flight::__callStatic('start', Array)
#21 {main}