Warning: mysqli_connect(): php_network_getaddresses: getaddrinfo for mysql-30dad50d-school-mng.a.aivencloud.com failed: Name or service not known in /var/www/html/includes/config.php on line 9

Fatal error: Uncaught mysqli_sql_exception: php_network_getaddresses: getaddrinfo for mysql-30dad50d-school-mng.a.aivencloud.com failed: Name or service not known in /var/www/html/includes/config.php:9 Stack trace: #0 /var/www/html/includes/config.php(9): mysqli_connect('mysql-30dad50d-...', 'avnadmin', 'AVNS_bdrcM2sv7L...', 'defaultdb', '22489') #1 /var/www/html/index.php(1): include('/var/www/html/i...') #2 {main} thrown in /var/www/html/includes/config.php on line 9