Module not found: Error can't resolve 'child_process', how to fix?

just put in package.json

"browser":{
"child_process": false
}  

are you using webpack

I got a similar error while trying to run storybook.js which uses webpack.

For Webpack

You can add the following to the webpack's config to fix the build -

// webpack.config.js
...,
node: {
    child_process: "empty"
    // fs: "empty", // if unable to resolve "fs"
},

You can also set other conflicting modules to "empty" if they are responsible for breaking the build.

Reference for Webpack's config.node