Warning: Unsupported declare 'strict_types' in /var/www/html/push-notification-service-v2/vendor/kreait/firebase-php/src/Firebase/Exception/Auth/RevokedIdToken.php on line 3

Fatal error: Default value for parameters with a class type hint can only be NULL in /var/www/html/push-notification-service-v2/vendor/kreait/firebase-php/src/Firebase/Exception/Auth/RevokedIdToken.php on line 17