Fatal error: Uncaught Error: Interface "Kreait\Firebase\Exception\DatabaseException" not found in D:\xampp\htdocs\vendor\kreait\firebase-php\src\Firebase\Exception\Database\UnsupportedQuery.php:12 Stack trace: #0 {main} thrown in D:\xampp\htdocs\vendor\kreait\firebase-php\src\Firebase\Exception\Database\UnsupportedQuery.php on line 12