[2017-10-06 04:20:22] main.CRITICAL: exception 'PDOException' with message 'SQLSTATE[28000] [1045] Access denied for user 'xxx'@'xxx' (using password: YES)' in /home/xx-xx/public_html/vendor/magento/zendframework1/library/Zend/Db/Adapter/Pdo/Abstract.php:129
I have Changed Folder/Files permission to 755/644 respectively