Warning: mysqli::__construct(): php_network_getaddresses: getaddrinfo for db failed: Temporary failure in name resolution in /var/www/html/app-menu/carousel-secondary.php on line 7

Fatal error: Uncaught mysqli_sql_exception: php_network_getaddresses: getaddrinfo for db failed: Temporary failure in name resolution in /var/www/html/app-menu/carousel-secondary.php:7 Stack trace: #0 /var/www/html/app-menu/carousel-secondary.php(7): mysqli->__construct('db', 'adm1n_ltc_db', Object(SensitiveParameterValue), 'ltc_letter') #1 /var/www/html/index.php(11): include('/var/www/html/a...') #2 {main} thrown in /var/www/html/app-menu/carousel-secondary.php on line 7