concurrently npm:start

[sulaiman21]

I have clone this repo into my pc (I am using Ubuntu 18.0.4) and i did all these steps
1: npm install
2: npm run build
3: npm start
after that i am facing this error "[email protected] start: concurrently npm:start-*"
My level of development is in between beginner and intermediate level. Kindly help me.