Warning: mysqli_connect(): Error while reading greeting packet. PID=200500 in /var/web_resources/doa/doa_connection.inc.php on line 14

Fatal error: Uncaught mysqli_sql_exception: MySQL server has gone away in /var/web_resources/doa/doa_connection.inc.php:14 Stack trace: #0 /var/web_resources/doa/doa_connection.inc.php(14): mysqli_connect() #1 /var/www/doa/login/include/database.php(22): require_once('...') #2 /var/www/doa/login/include/session.php(21): include('...') #3 /var/www/doa/name.php(16): include('...') #4 {main} thrown in /var/web_resources/doa/doa_connection.inc.php on line 14