The syntax of the command is incorrect.

[vivek9716]

Why I am getting this error :

[yinfo]

The same mistake. Perhaps the project is not working - just look at the code?

[AlirezaEbrahimkhani]

you should go to the package.json file and in the script section add this line
"start": "http-server -c-1"
and then run npm start command
i think it should work...