消息推送一直报错

[2020-01-30 16:43:31] production.ERROR: Return value of App\Notifications\TopicReplied::toJPush() must be an instance of JPush\PushPayload, none returned {"exception":"[object] (Symfony\Component\Debug\Exception\FatalThrowableError(code: 0): Return value of App\Notifications\TopicReplied::toJPush() must be an instance of JPush\PushPayload, none returned at /home/vagrant/Code/Larabbs/app/Notifications/TopicReplied.php:67)
[stacktrace]