Error: Command "yarn run build" exited with 1?

Question

Software Deployment

I'm trying to deploy a react app in vercel, but it gives an error:
Error: Command "yarn run build" exited with 1
error Command failed with exit code 1.
Treating warnings as errors because process.env.CI = true.
Most CI servers set it automatically.
Failed to compile.
Same problem on Heroku.

Answer 1

Try Netlify
I think it's more user friendly
https://www.netlify.com/blog/2016/07/22/deploy-rea...
UPDs:
https://github.com/vercel/vercel/discussions/ 5566 this thread watched?