How can I solve this?? The serve command requires to be run in an Angular project, but a...

I know that this question already was on Stackoverflow, and I'm sorry for it, but I didn't get my right answer, so this is a situation: I try to run my project and I get this error --

The serve command requires to be run in an Angular project, but a project definition could not be found.
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1. Project was cloned from git and it is of elder vervion of Angular5.
2. I tried to -npm install , -npm update, -ng i @angular/cli.
3. Tried to unistall and clean cache.
4. I -ng serve it in the right directory

So what I can do more to solve this issue???

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