npm install Error: rollbackFailedOptional

node.js react-native npm

    # first this    > npm config rm proxy    > npm config rm https-proxy    # then this    > npm config set registry https://registry.npmjs.org/

solved my problem.

Again: Be sure to check whether you have internet connected properly.

node.js react-native npm

Try this

npm config rm proxynpm config rm https-proxy

node.js react-native npm

In my case I had to edit the .npmrc directly and add the proxy settings manually.

proxy=http://yourorganizationproxy.com:8080https-proxy=http://yourorganizationproxy.com:8080

Hope this helps someone.

CodeHunter