Warning: mysqli::__construct(): php_network_getaddresses: getaddrinfo for mariadb_server failed: Temporary failure in name resolution in /var/www/html/.config/.config.php on line 11

Fatal error: Uncaught mysqli_sql_exception: php_network_getaddresses: getaddrinfo for mariadb_server failed: Temporary failure in name resolution in /var/www/html/.config/.config.php:11 Stack trace: #0 /var/www/html/.config/.config.php(11): mysqli->__construct('mariadb_server', 'catabits', Object(SensitiveParameterValue), 'catabits') #1 /var/www/html/index.php(20): require_once('/var/www/html/....') #2 {main} thrown in /var/www/html/.config/.config.php on line 11