Warning: mysqli_real_connect(): (HY000/2002): Connection refused in /var/www/wordpress/wp-includes/class-wpdb.php on line 1987

Error establishing a database connection

Notice: Function QM_DB was called incorrectly. QM_DB must set a database connection for use with escaping. Please see Debugging in WordPress for more information. (This message was added in version 3.6.0.) in /var/www/wordpress/wp-includes/functions.php on line 6031

Warning: mysqli_real_connect(): (HY000/2002): Connection refused in /var/www/wordpress/wp-includes/class-wpdb.php on line 1987

Error establishing a database connection