Fatal error: Uncaught Error: Class "Magento\Framework\App\Config\FileResolver" not found in /home/airtimer/public_html/vendor/magento/framework/Config/FileResolverByModule.php:16 Stack trace: #0 {main} thrown in /home/airtimer/public_html/vendor/magento/framework/Config/FileResolverByModule.php on line 16