Error: only one instance of babel-polyfill is allowed

I just took react-starter-kit to try it out. I did not modify anything in the repository files. I do not yet have good knowledge in node.js and webpack and will provide any additional information needed.

Actions untill error:

1. I cloned the repository.
2. ran yarn install
3. ran yarn start

And then I get this error:

Error: only one instance of babel-polyfill is allowed at Object.<anonymous> (D:\development\some\node_modules\babel-polyfill\lib\index.js:10:9) at Module._compile (module.js:571:32) at Module._extensions..js (module.js:580:10) at Object.require.extensions.(anonymous function) [as .js] (D:\DEVELOPMENT\some\node_modules\babel-register\lib\node.js: 152:7) at Module.load (module.js:488:32) at tryModuleLoad (module.js:447:12) at Function.Module._load (module.js:439:3) at Module.require (module.js:498:17) at require (internal/module.js:20:19) at Object.6 (D:\development\some\external "babel-polyfill":1:1) error Command failed with exit code 1.

[mort3za]

+1

System: Host: *** Kernel: 3.19.0-32-generic x86_64 (64 bit) Desktop: MATE 1.12.0 Distro: Linux Mint 17.3 Rosa

@VimCommando There is no babel-runtime in package.json for me.

[VimCommando]

I was getting this error and had to remove the babel-runtime package from my package.json dependencies.

The error message is less than helpful, but both packages effectively do the same thing in different ways and cannot be used together.

Here is a short article about it: Babel-polyfill and Babel-runtime Easily Explained