fix

ruoyi-system/src/main/java/com/ruoyi/app/service/impl/TbMyPublishServiceImpl.java

@@ -165,8 +165,10 @@ public class TbMyPublishServiceImpl extends ServiceImpl<TbMyPublishMapper, TbMyP
             // 如果是留念人发表
             if (publish.getMessageUserId() != null) {
                 TbAppUser user = userService.getById(publish.getMessageUserId());
-                publish.setMessageUser(user.getNickName());
-                publish.setMessageUserAvatar(user.getAvatar());
+                if (user != null) {
+                    publish.setMessageUser(user.getNickName());
+                    publish.setMessageUserAvatar(user.getAvatar());
+                }
             }
             publish.setImgList(publishImgs);
             publish.setCommentList(commentList);