Fatal error: Uncaught Error: Class "Monolog\Logger" not found in /var/www/share/www.meissen.com/htdocs/vendor/magento/framework/Logger/Monolog.php:16 Stack trace: #0 /var/www/share/www.meissen.com/htdocs/vendor/composer/ClassLoader.php(576): include() #1 /var/www/share/www.meissen.com/htdocs/vendor/composer/ClassLoader.php(427): Composer\Autoload\{closure}('...') #2 [internal function]: Composer\Autoload\ClassLoader->loadClass('...') #3 /var/www/share/www.meissen.com/htdocs/vendor/magento/framework/Code/Reader/ClassReader.php(34): ReflectionClass->__construct('...') #4 /var/www/share/www.meissen.com/htdocs/vendor/magento/framework/ObjectManager/Definition/Runtime.php(50): Magento\Framework\Code\Reader\ClassReader->getConstructor('...') #5 /var/www/share/www.meissen.com/htdocs/vendor/magento/framework/ObjectManager/Factory/Dynamic/Developer.php(48): Magento\Framework\ObjectManager\Definition\Runtime->getParameters('...') #6 /var/www/share/www.meissen.com/htdocs/vendor/magento/framework/ObjectManager/ObjectManager.php(73): Magento\Framework\ObjectManager\Factory\Dynamic\Developer->create('...') #7 /var/www/share/www.meissen.com/htdocs/vendor/magento/framework/Logger/LoggerProxy.php(101): Magento\Framework\ObjectManager\ObjectManager->get('...') #8 /var/www/share/www.meissen.com/htdocs/vendor/magento/framework/Logger/LoggerProxy.php(131): Magento\Framework\Logger\LoggerProxy->getLogger() #9 /var/www/share/www.meissen.com/htdocs/vendor/magento/framework/App/Bootstrap.php(445): Magento\Framework\Logger\LoggerProxy->critical(Object(Error)) #10 /var/www/share/www.meissen.com/htdocs/vendor/magento/framework/App/Bootstrap.php(275): Magento\Framework\App\Bootstrap->terminate(Object(Error)) #11 /var/www/share/www.meissen.com/htdocs/index.php(95): Magento\Framework\App\Bootstrap->run(Object(Magento\Framework\App\Http\Interceptor)) #12 {main} thrown in /var/www/share/www.meissen.com/htdocs/vendor/magento/framework/Logger/Monolog.php on line 16