Warning: mysqli::__construct(): php_network_getaddresses: getaddrinfo for dbserv.mariadb failed: Name or service not known in /var/www/cr_core_app/includes/applicationDB.php on line 3

Fatal error: Uncaught mysqli_sql_exception: php_network_getaddresses: getaddrinfo for dbserv.mariadb failed: Name or service not known in /var/www/cr_core_app/includes/applicationDB.php:3 Stack trace: #0 /var/www/cr_core_app/includes/applicationDB.php(3): mysqli->__construct() #1 /var/www/cr_core_app/includes/security.php(4): require_once('...') #2 /var/www/cr_core_app/register.php(2): require_once('...') #3 {main} thrown in /var/www/cr_core_app/includes/applicationDB.php on line 3