Fatal error: Uncaught Error: Interface "Kreait\Firebase\Http\HasSubRequests" not found in /home/cvpchat/public_html/websocket/vendor/kreait/firebase-php/src/Firebase/Messaging/Http/Request/SendMessages.php:15 Stack trace: #0 {main} thrown in /home/cvpchat/public_html/websocket/vendor/kreait/firebase-php/src/Firebase/Messaging/Http/Request/SendMessages.php on line 15