Warning: mysql_connect(): Lost connection to MySQL server at 'reading initial communication packet', system error: 0 in /var/web/site/public_html/wp-content/db.php on line 256

Warning: mysql_connect(): Lost connection to MySQL server at 'reading initial communication packet', system error: 0 in /var/web/site/public_html/wp-content/db.php on line 258

Fatal error: Uncaught TypeError: Argument 1 passed to mysqli_select_db() must be an instance of mysqli, bool given in /var/web/site/public_html/wp-includes/wp-db.php:1094
Stack trace:
#0 /var/web/site/public_html/wp-includes/wp-db.php(1094): mysqli_select_db()
#1 /var/web/site/public_html/wp-content/db.php(267): wpdb->select()
#2 /var/web/site/public_html/wp-content/db.php(917): m_wpdb->__construct()
#3 /var/web/site/public_html/wp-includes/load.php(546): include()
#4 /var/web/site/public_html/wp-settings.php(124): require_wp_db()
#5 /var/web/site/public_html/wp-config.php(156): include()
#6 /var/web/site/public_html/wp-load.php(50): include()
#7 /var/web/site/public_html/wp-blog-header.php(13): include()
#8 /var/web/site/public_html/index.php(22): include()
#9 {main}