Heroku cannot find module 'spawn-sync'

Question

I am trying to install my node project to run online however when i try to push to heroku master I get errors. I followed these steps: https://devcenter.heroku.com/articles/getting-started-with-nodejs#push-local-changes the first error is:

remote:        > node lib/install.js
remote:
remote:        module.js:338
remote:            throw err;
remote:                  ^
remote:        Error: Cannot find module 'spawn-sync'
remote:            at Function.Module._resolveFilename (module.js:336:15)
remote:            at Function.Module._load (module.js:278:25)
remote:            at Module.require (module.js:365:17)
remote:            at require (module.js:384:17)
remote:            at Object.<anonymous>        check/index.js:5:17)

I tried to install de module with npm install spawn-sync --save and runned git add -A and git commit -m "added spawn-sync" and again tried to git push heroku master but the error keeps coming up. I'm working in a branch and i'm in the root folder of my application. Does anyone know how to fix this

Answer 1

1. Make sure you're on the master branch. If you're not working on master , you should push to heroku like git push heroku branchYouAreOn:master .

2. Make sure spawn-sync is listed in dependencies in your package.json file.