Fatal error: Uncaught Error: Interface "Symfony\Component\Config\Definition\ConfigurableInterface" not found in /homepages/18/d179646520/htdocs/PHPFUIWebsite/Symfony/Component/DependencyInjection/Extension/ConfigurableExtensionInterface.php:21 Stack trace: #0 /homepages/18/d179646520/htdocs/PHPFUIWebsite/commonbase.php(15): include_once() #1 /homepages/18/d179646520/htdocs/PHPFUIWebsite/Symfony/Component/DependencyInjection/Extension/AbstractExtension.php(25): autoload('Symfony\\Compone...') #2 /homepages/18/d179646520/htdocs/PHPFUIWebsite/commonbase.php(15): include_once('/homepages/18/d...') #3 [internal function]: autoload('Symfony\\Compone...') #4 /homepages/18/d179646520/htdocs/PHPFUIWebsite/PHPFUI/InstaDoc/Controller.php(463): ReflectionClass->__construct('Symfony\\Compone...') #5 /homepages/18/d179646520/htdocs/PHPFUIWebsite/PHPFUI/InstaDoc/Controller.php(159): PHPFUI\InstaDoc\Controller->getConstructorParameters('Symfony\\Compone...') #6 /homepages/18/d179646520/htdocs/PHPFUIWebsite/www/index.php(107): PHPFUI\InstaDoc\Controller->display() #7 {main} thrown in /homepages/18/d179646520/htdocs/PHPFUIWebsite/Symfony/Component/DependencyInjection/Extension/ConfigurableExtensionInterface.php on line 21