Warning: Undefined array key "frontend" in /var/www/vhosts/puppen-eins.de/www.puppen-eins.de/vendor/magento/framework/App/Cache/Frontend/Pool.php on line 90

Fatal error: Uncaught Magento\Framework\Exception\RuntimeException: Type Error occurred when creating object: Magento\Framework\App\Interception\Cache\CompiledConfig, array_replace_recursive(): Argument #2 must be of type array, null given in /var/www/vhosts/puppen-eins.de/www.puppen-eins.de/vendor/magento/framework/ObjectManager/Factory/AbstractFactory.php:131 Stack trace: #0 /var/www/vhosts/puppen-eins.de/www.puppen-eins.de/vendor/magento/framework/ObjectManager/Factory/Compiled.php(108): Magento\Framework\ObjectManager\Factory\AbstractFactory->createObject() #1 /var/www/vhosts/puppen-eins.de/www.puppen-eins.de/vendor/magento/framework/ObjectManager/ObjectManager.php(70): Magento\Framework\ObjectManager\Factory\Compiled->create() #2 /var/www/vhosts/puppen-eins.de/www.puppen-eins.de/vendor/magento/framework/App/ObjectManager/Environment/Compiled.php(117): Magento\Framework\ObjectManager\ObjectManager->get() #3 /var/www/vhosts/puppen-eins.de/www.puppen-eins.de/vendor/magento/framework/App/ObjectManagerFactory.php(191): Magento\Framework\App\ObjectManager\Environment\Compiled->configureObjectManager() #4 /var/www/vhosts/puppen-eins.de/www.puppen-eins.de/vendor/magento/framework/App/Bootstrap.php(212): Magento\Framework\App\ObjectManagerFactory->create() #5 /var/www/vhosts/puppen-eins.de/www.puppen-eins.de/vendor/magento/framework/App/Bootstrap.php(127): Magento\Framework\App\Bootstrap->__construct() #6 /var/www/vhosts/puppen-eins.de/www.puppen-eins.de/pub/index.php(27): Magento\Framework\App\Bootstrap::create() #7 {main} thrown in /var/www/vhosts/puppen-eins.de/www.puppen-eins.de/vendor/magento/framework/ObjectManager/Factory/AbstractFactory.php on line 131