pm2 ls出现一下警告，然后列表为空时：Current process list is not synchronized with saved list. App demo differs. Type 'pm2 save' to synchronize.https://blog.bg7zag.com/wp-content/uploads/2024/02/1708568217-20240222101158.jpg
之前启动保存的项目不见了，这时候不要慌，执行下面命令即可恢复：
pm2 update参考：github issue