Aura Op den Camp

Warning: mysqli_connect(): (HY000/2002): No connection could be made because the target machine actively refused it. in C:\Program Files\XAMPP\htdocs\auraopdencamp\core.php on line 164

Fatal error: Uncaught TypeError: Return value of Database::connect() must be an instance of mysqli, boolean returned in C:\Program Files\XAMPP\htdocs\auraopdencamp\core.php:166 Stack trace: #0 C:\Program Files\XAMPP\htdocs\auraopdencamp\core.php(171): Database::connect() #1 C:\Program Files\XAMPP\htdocs\auraopdencamp\core.php(331): Database::select('SELECT id, titl...') #2 C:\Program Files\XAMPP\htdocs\auraopdencamp\index.php(25): PostDAO::getVisiblePosts() #3 {main} thrown in C:\Program Files\XAMPP\htdocs\auraopdencamp\core.php on line 166