Slim Application Error

The application could not run because of the following error:

Details

Type: ErrorException
Code: 8
Message: Undefined index: id
File: /home/gjwjav/public_html/model/Products.php
Line: 93

Trace

#0 /home/gjwjav/public_html/model/Products.php(93): Slim\Slim::handleErrors(8, 'Undefined index...', '/home/gjwjav/pu...', 93, Array)
#1 /home/gjwjav/public_html/controller/ControllerProducts.php(35): Products::getProductByAlias(Array)
#2 /home/gjwjav/public_html/model/PageType.php(221): ControllerProducts->__construct(Array)
#3 /home/gjwjav/public_html/index.php(308): PageType::getController(Array)
#4 [internal function]: {closure}(Array)
#5 /home/gjwjav/public_html/vendor/slim/slim/Slim/Route.php(462): call_user_func_array(Object(Closure), Array)
#6 /home/gjwjav/public_html/vendor/slim/slim/Slim/Slim.php(1326): Slim\Route->dispatch()
#7 /home/gjwjav/public_html/vendor/slim/slim/Slim/Middleware/Flash.php(85): Slim\Slim->call()
#8 /home/gjwjav/public_html/vendor/slim/slim/Slim/Middleware/MethodOverride.php(92): Slim\Middleware\Flash->call()
#9 /home/gjwjav/public_html/vendor/slim/slim/Slim/Middleware/PrettyExceptions.php(67): Slim\Middleware\MethodOverride->call()
#10 /home/gjwjav/public_html/vendor/slim/slim/Slim/Slim.php(1271): Slim\Middleware\PrettyExceptions->call()
#11 /home/gjwjav/public_html/index.php(366): Slim\Slim->run()
#12 {main}