Fatal error: Uncaught TypeError: mysqli_query(): Argument #1 ($mysql) must be of type mysqli, false given in /srv/www/vhosts/tmh-webhosting.de/subdomains/haus3/httpdocs/include/db_connect.php:54 Stack trace: #0 /srv/www/vhosts/tmh-webhosting.de/subdomains/haus3/httpdocs/include/db_connect.php(54): mysqli_query() #1 /srv/www/vhosts/tmh-webhosting.de/subdomains/haus3/httpdocs/index.php(9): datenbank->sql_befehl() #2 {main} thrown in /srv/www/vhosts/tmh-webhosting.de/subdomains/haus3/httpdocs/include/db_connect.php on line 54