Warning: Unsupported declare 'strict_types' in D:\xampp\htdocs\masterweb_android_api\vendor\kreait\firebase-php\src\Firebase\Messaging\Http\Request\SendMessages.php on line 3

Fatal error: Interface 'Kreait\Firebase\Http\HasSubRequests' not found in D:\xampp\htdocs\masterweb_android_api\vendor\kreait\firebase-php\src\Firebase\Messaging\Http\Request\SendMessages.php on line 15