Fatal error: Uncaught Error: Class "Kreait\Firebase\Exception\RuntimeException" not found in /home/tyasart/public_html/vendor/kreait/firebase-php/src/Firebase/Exception/Auth/PhoneNumberExists.php:10 Stack trace: #0 {main} thrown in /home/tyasart/public_html/vendor/kreait/firebase-php/src/Firebase/Exception/Auth/PhoneNumberExists.php on line 10