`yarn start` fails with error message

Description

yarn startfails with below message

yarn start v0.15.1 $ “react-scripts start” sh: react-scripts start: command not found error Command failed with exit code 127. info Visit http://yarnpkg.com/en/docs/cli/start for documentation about this command.

Expected behavior

According to the prompt after creating a project, yarn star should work.

We suggest that you begin by typing: cd xyz yarn start Happy hacking!

Actual behavior

Tell us what actually happens.

Environment

node -v
v7.2.0

npm -v
3.10.9

create-react-app --version                                                                                                                 
create-react-app version: 1.0.0

Operating system: MacOSX 10.12.1

Reproducible Demo

1. Globally install create-react-app and create one project called xyz.
2. Follow the prompt instructions;
3. yarn start fails, but npm start works.

[zverbatim]

worked for me after running just the command yarn in project folder

[peggyc3]

I had a similar problem, caused by installing a package using npm instead of yarn, which is what I was using for this project. I got the react script not found error message and the server would not start. To fix it, I ran yarn, then ran yarn start and the server restarted. SUCCESS 😃