It may be that the server is slow to load friends' information. Wait a moment. If it still doesn't work, click the menu on the QQ panel → Friends and Information → Update Friends, and you will be prompted to log in to QQ again. It's time to reload the buddy list. After a while, you can usually display the names of your friends' notes. If not, it means that the server didn't synchronize in time when the comment was last modified, so it can only be modified manually again.