Fatal error: Uncaught Error: Cannot instantiate interface Magento\Catalog\Model\Layer\AvailabilityFlagInterface in /usr/home/kiwora0/www/vendor/magento/framework/ObjectManager/Factory/Dynamic/Developer.php:50 Stack trace: #0 /usr/home/kiwora0/www/vendor/magento/framework/ObjectManager/ObjectManager.php(70): Magento\Framework\ObjectManager\Factory\Dynamic\Developer->create('Magento\\Catalog...') #1 /usr/home/kiwora0/www/vendor/magento/framework/ObjectManager/Factory/AbstractFactory.php(160): Magento\Framework\ObjectManager\ObjectManager->get('Magento\\Catalog...') #2 /usr/home/kiwora0/www/vendor/magento/framework/ObjectManager/Factory/AbstractFactory.php(246): Magento\Framework\ObjectManager\Factory\AbstractFactory->resolveArgument(Array, 'Magento\\Catalog...', NULL, 'visibilityFlag', 'Amasty\\Shopby\\B...') #3 /usr/home/kiwora0/www/vendor/magento/framework/ObjectManager/Factory/Dynamic/Developer.php(34): Magento\Framework\ObjectManager\Factory\AbstractFactory->resolveArgumentsInRuntime('Amasty\\Shopby\\B...', Array, Array in /usr/home/kiwora0/www/vendor/magento/framework/ObjectManager/Factory/Dynamic/Developer.php on line 50