Slim Application Error

The application could not run because of the following error:

Details

Type: Error
Message: Call to a member function orderBy() on null
File: /home/c/cg30263/new.izumrudny-gorod-19.ru/app/modules/product_catalog/controller/CategoryController.php
Line: 106

Trace

#0 [internal function]: ADFM\Controller\CategoryController->showCategoryPage(Object(Slim\Http\Request), Object(Slim\Http\Response), Array)
#1 /home/c/cg30263/new.izumrudny-gorod-19.ru/vendor/slim/slim/Slim/Handlers/Strategies/RequestResponse.php(41): call_user_func(Array, Object(Slim\Http\Request), Object(Slim\Http\Response), Array)
#2 /home/c/cg30263/new.izumrudny-gorod-19.ru/vendor/slim/slim/Slim/Route.php(335): Slim\Handlers\Strategies\RequestResponse->__invoke(Array, Object(Slim\Http\Request), Object(Slim\Http\Response), Array)
#3 /home/c/cg30263/new.izumrudny-gorod-19.ru/vendor/slim/slim/Slim/MiddlewareAwareTrait.php(117): Slim\Route->__invoke(Object(Slim\Http\Request), Object(Slim\Http\Response))
#4 /home/c/cg30263/new.izumrudny-gorod-19.ru/vendor/slim/slim/Slim/Route.php(313): Slim\Route->callMiddlewareStack(Object(Slim\Http\Request), Object(Slim\Http\Response))
#5 /home/c/cg30263/new.izumrudny-gorod-19.ru/vendor/slim/slim/Slim/App.php(513): Slim\Route->run(Object(Slim\Http\Request), Object(Slim\Http\Response))
#6 /home/c/cg30263/new.izumrudny-gorod-19.ru/app/core/middleware/AdminMenu.php(16): Slim\App->__invoke(Object(Slim\Http\Request), Object(Slim\Http\Response))
#7 [internal function]: AdminMenu->__invoke(Object(Slim\Http\Request), Object(Slim\Http\Response), Object(Slim\App))
#8 /home/c/cg30263/new.izumrudny-gorod-19.ru/vendor/slim/slim/Slim/DeferredCallable.php(43): call_user_func_array(Object(AdminMenu), Array)
#9 [internal function]: Slim\DeferredCallable->__invoke(Object(Slim\Http\Request), Object(Slim\Http\Response), Object(Slim\App))
#10 /home/c/cg30263/new.izumrudny-gorod-19.ru/vendor/slim/slim/Slim/MiddlewareAwareTrait.php(70): call_user_func(Object(Slim\DeferredCallable), Object(Slim\Http\Request), Object(Slim\Http\Response), Object(Slim\App))
#11 /home/c/cg30263/new.izumrudny-gorod-19.ru/vendor/slim/slim/Slim/MiddlewareAwareTrait.php(117): Slim\App->Slim\{closure}(Object(Slim\Http\Request), Object(Slim\Http\Response))
#12 /home/c/cg30263/new.izumrudny-gorod-19.ru/vendor/slim/slim/Slim/App.php(406): Slim\App->callMiddlewareStack(Object(Slim\Http\Request), Object(Slim\Http\Response))
#13 /home/c/cg30263/new.izumrudny-gorod-19.ru/vendor/slim/slim/Slim/App.php(314): Slim\App->process(Object(Slim\Http\Request), Object(Slim\Http\Response))
#14 /home/c/cg30263/new.izumrudny-gorod-19.ru/app/core/App.php(170): Slim\App->run()
#15 /home/c/cg30263/new.izumrudny-gorod-19.ru/public_html/index.php(11): App->__construct()
#16 {main}

Notice: Undefined index: sort in /home/c/cg30263/new.izumrudny-gorod-19.ru/app/modules/product_catalog/controller/CategoryController.php on line 103

Notice: Undefined variable: products in /home/c/cg30263/new.izumrudny-gorod-19.ru/app/modules/product_catalog/controller/CategoryController.php on line 106