调用发布接口之后，微信回调拿不到PublishEventInfo的信息， {\"CreateTime\":\"1735526870\",\"Event\":\"PUBLISHJOBFINISH\",\"ToUserName\":\"gh_843dd159ca7c\",\"FromUserName\":\"oFQbn5pZ7N83Mfa3dnnsqy9GIsI8\",\"MsgType\":\"event\",\"Encrypt\":\"xxx",\"PublishEventInfo\":\"\\n        \\n        \\n        \\n        \\n    \"}

接口: https://api.weixin.qq.com/cgi-bin/message/mass/preview?access_token=ACCESS_TOKEN 入参: https://api.weixin.qq.com/cgi-bin/message/mass/preview?access_token=xxx,{"touser":"xxx","mpnews":{"media_id":"s7zzn6zaRem-_8MUzSxs6MvUdvl0SnhBttiplJsheUfI2EHA5vu_aWPFXgXfFivE"},"msgtype":"mpnews"}  出参: {"errcode":40229,"errmsg":"empty media cover, please check the media rid: 6731c929-5ce9e137-2c4e27e1"}