Fatal error: Uncaught mysqli_sql_exception: mysqlnd cannot connect to MySQL 4.1+ using the old insecure authentication. Please use an administration tool to reset your password with the command SET PASSWORD = PASSWORD('your_existing_password'). This will store a new, and more secure, hash value in mysql.user. If this user is used in other scripts executed by PHP 5.2 or earlier you might need to remove the old-passwords flag from your my.cnf file in /home/piercha1/website/wp-includes/wp-db.php:1614
Stack trace:
#0 /home/piercha1/website/wp-includes/wp-db.php(1614): mysqli_real_connect()
#1 /home/piercha1/website/wp-includes/wp-db.php(639): wpdb->db_connect()
#2 /home/piercha1/website/wp-includes/load.php(435): wpdb->__construct()
#3 /home/piercha1/website/wp-settings.php(109): require_wp_db()
#4 /home/piercha1/website/wp-config.php(76): require_once('/home/piercha1/...')
#5 /home/piercha1/website/wp-load.php(37): require_once('/home/piercha1/...')
#6 /home/piercha1/website/wp-blog-header.php(13): require_once('/home/piercha1/...')
#7 /home/piercha1/website/index.php(17): require('/home/piercha1/...')
#8 {main}
  thrown in /home/piercha1/website/wp-includes/wp-db.php on line 1614