我从一个用户的 websocket 连接切换到聊天室，两个人可以互相连接，但是在切换时，在 receive 方法中，现在需要 group_send，之后就停止工作了，如何修复？
完整回溯
> Exception inside application: No handler for message type
> websocket.group_send File
> "D:\Dev\Web\Chaty\lib\site-packages\channels\sessions.py", line 183,
> in __call__
> return await self.inner(receive, self.send) File "D:\Dev\Web\Chaty\lib\site-packages\channels\middleware.py", line 41,
> in coroutine_call
> await inner_instance(receive, send) File "D:\Dev\Web\Chaty\lib\site-packages\channels\consumer.py", line 59, in
> __call__
> [receive, self.channel_receive], self.dispatch File "D:\Dev\Web\Chaty\lib\site-packages\channels\utils.py", line 52, in
> await_many_dispatch
> await dispatch(result) File "D:\Dev\Web\Chaty\lib\site-packages\channels\consumer.py", line 75, in
> dispatch
> raise ValueError("No handler for message type %s" % message["type"]) …