Fatal error: Uncaught TypeError: mysqli_error(): Argument #1 ($mysql) must be of type mysqli, bool given in D:\xampp\htdocs\webboard1\Sources\Subs-Auth.php:367 Stack trace: #0 D:\xampp\htdocs\webboard1\Sources\Subs-Auth.php(367): mysqli_error(false) #1 D:\xampp\htdocs\webboard1\Sources\Errors.php(422): show_db_error(false) #2 D:\xampp\htdocs\webboard1\index.php(82): db_fatal_error() #3 {main} thrown in D:\xampp\htdocs\webboard1\Sources\Subs-Auth.php on line 367