The serve command requires to be run in an Angular project, but a project definition could not be found.

While typing "npm start" I see the next message `> ng2-admin@1.0.0 start
> ng serve

The serve command requires to be run in an Angular project, but a project definition could not be found.
npm ERR! code 1
npm ERR! path D:\projects\ClientApp\ngx-admin
npm ERR! command failed
npm ERR! command C:\WINDOWS\system32\cmd.exe /d /s /c ng serve

npm ERR! A complete log of this run can be found in:
npm ERR! C:\Users\SUPPORT\AppData\Local\npm-cache\_logs\2021-02-10T04_31_13_402Z-debug.log
`
How to fix that ?
Best regards ...