Fatal error: Uncaught TypeError: Argument 1 passed to common\helpers\Html::a() must be of the type string, null given, called in /home/udensfiltri/public_html/backend/controllers/ProductsController.php on line 284 and defined in /home/udensfiltri/public_html/common/helpers/Html.php:49 Stack trace: #0 /home/udensfiltri/public_html/backend/controllers/ProductsController.php(284): common\helpers\Html::a(NULL, Array) #1 [internal function]: backend\controllers\ProductsController->actionEdit('537', NULL) #2 /home/udensfiltri/public_html/vendor/php-di/invoker/src/Invoker.php(82): call_user_func_array(Array, Array) #3 /home/udensfiltri/public_html/vendor/php-di/php-di/src/Container.php(276): Invoker\Invoker->call(Array, Array) #4 /home/udensfiltri/public_html/constructor/Controller.php(97): DI\Container->call(Array, Array) #5 /home/udensfiltri/public_html/constructor/WebAction.php(37): Constructor\Controller->callAction(Object(Constructor\structures\ActionDefinition)) #6 /home/udensfiltri/public_html/constructor/WebApp.php(65): in /home/udensfiltri/public_html/common/helpers/Html.php on line 49