Notice: include(): read of 6008 bytes failed with errno=12 Cannot allocate memory in /var/www/webroot/ROOT/vendor/composer/ClassLoader.php on line 444

Warning: include(): Failed opening '/var/www/webroot/ROOT/vendor/composer/../magento/framework/Config/Reader/Filesystem.php' for inclusion (include_path='/var/www/webroot/ROOT/generated/code:/var/www/webroot/ROOT/generated/code:/var/www/webroot/ROOT/vendor/magento/zendframework1/library:.:/usr/share/pear') in /var/www/webroot/ROOT/vendor/composer/ClassLoader.php on line 444

Fatal error: Uncaught Error: Class 'Magento\Framework\Config\Reader\Filesystem' not found in /var/www/webroot/ROOT/vendor/magento/framework/ObjectManager/Config/Reader/Dom.php:8 Stack trace: #0 /var/www/webroot/ROOT/vendor/composer/ClassLoader.php(444): include() #1 /var/www/webroot/ROOT/vendor/composer/ClassLoader.php(322): Composer\Autoload\includeFile('/var/www/webroo...') #2 [internal function]: Composer\Autoload\ClassLoader->loadClass('Magento\\Framewo...') #3 /var/www/webroot/ROOT/vendor/magento/framework/App/ObjectManagerFactory.php(239): spl_autoload_call('Magento\\Framewo...') #4 /var/www/webroot/ROOT/vendor/magento/framework/App/ObjectManagerFactory.php(136): Magento\Framework\App\ObjectManagerFactory->createArgumentInterpreter(Object(Magento\Framework\Stdlib\BooleanUtils)) #5 /var/www/webroot/ROOT/vendor/magento/framework/App/Bootstrap.php(211): Magento\Framework\App\ObjectManagerFactory->create(Array) #6 /var/www/webroot/ROOT/vendor/magento/framework/App/Bootstrap.php(126): Magento\Framework\App\Bootstrap->__c in /var/www/webroot/ROOT/vendor/magento/framework/ObjectManager/Config/Reader/Dom.php on line 8