fix

mec-biz/src/main/java/com/ym/mec/biz/service/impl/ImLiveBroadcastRoomServiceImpl.java

@@ -633,7 +633,7 @@ public class ImLiveBroadcastRoomServiceImpl extends ServiceImpl<ImLiveBroadcastR
                         .avatarUrl(sysUser.getAvatar())
                         .build();
 
-                message.setMessageContent(LiveRoomMessage.MessageContent.builder().sendUserInfo(messageUser).build());
+                message.setContent(LiveRoomMessage.MessageContent.builder().sendUserInfo(messageUser).build());
             }
 
             LivePluginService pluginService = livePluginContext.getPluginService(room.getServiceProvider());