Warning: mysqli_connect(): Error while reading greeting packet. PID=5616 in C:\xampp\szkola\class.php on line 11

Fatal error: Uncaught mysqli_sql_exception: MySQL server has gone away in C:\xampp\szkola\class.php:11 Stack trace: #0 C:\xampp\szkola\class.php(11): mysqli_connect('localhost', 'zsz2user', Object(SensitiveParameterValue)) #1 C:\xampp\szkola\index.php(6): My_site->__construct() #2 C:\xampp\htdocs\zsz2\index.php(8): require_once('C:\\xampp\\szkola...') #3 {main} thrown in C:\xampp\szkola\class.php on line 11