Fatal error: Uncaught TypeError: Unsupported operand types: string - int in /home2/porta917/public_html/system/storage/modification/catalog/controller/product/category.php:174 Stack trace: #0 /home2/porta917/public_html/system/storage/modification/system/engine/action.php(44): ControllerProductCategory->index() #1 /home2/porta917/public_html/system/engine/front.php(34): Action->execute(Object(Registry)) #2 /home2/porta917/public_html/system/engine/front.php(29): Front->execute(Object(Action)) #3 /home2/porta917/public_html/system/framework.php(99): Front->dispatch(Object(Action), Object(Action)) #4 /home2/porta917/public_html/index.php(22): require_once('/home2/porta917...') #5 {main} thrown in /home2/porta917/public_html/system/storage/modification/catalog/controller/product/category.php on line 174