Fatal error: Uncaught mysqli_sql_exception: Unknown database 'https_chat' in /var/www/user/valentin/home/projects/https_chat/inc/db_mysqli.class.php:13 Stack trace: #0 /var/www/user/valentin/home/projects/https_chat/inc/db_mysqli.class.php(13): mysqli_connect() #1 /var/www/user/valentin/home/projects/https_chat/inc/db.inc.php(25): db_mysqli->db_open() #2 /var/www/user/valentin/home/projects/https_chat/index.php(4): require_once('...') #3 {main} thrown in /var/www/user/valentin/home/projects/https_chat/inc/db_mysqli.class.php on line 13