[?] Please select a region:
1) China East
2) China North
=> 2
FO] Retrieve app list ...
[?] Please select an app:
1) 医药知识问答 (current)
=> 1
Switching to app: 医药知识问答, group: web
C:\Users\ASUS\Desktop\毕设\answer-game-master\answer-game-master>lean up
[INFO] Current CLI tool version: 0.24.3
[31m[ERROR][0m Unsupported project structure. Please inspect your directory structure to make sure it is a valid LeanEngine project.
请问这是什么原因