ERROR in multi babel-polyfill ./src/client/index Module not found: Error: Can't resolve 'babel' in 'C:\Users\messi\New folder' @ multi babel-polyfill ./src/client/index main[1] about babel-upgrade

I was facing same issue. I found that one of my custom plugin has error. After fixing that things worked fine

[iyasmavoor]

i also face same problem

`const path=require('path');
const HtmlWebpackPlugin = require('html-webpack-plugin');

module.exports={
entry:['babel-polifill','./src/js/index.js'],
output:{
path:path.resolve(__dirname,'dist'),
filename:'js/bundle.js'
},
plugins:[
new HtmlWebpackPlugin({
filename:'index.html',
template : './src/index.html'
})
],
module:{
rules:[
{
test:/.js$/,
exclude:/node_modules/,
use:{
loader:'babel-loader'
}
}
]
}

};`

but the error comes as

ERROR in multi babel-polifill ./src/js/index.js
Module not found: Error: Can't resolve 'babel-polifill' in 'C:\Users\Acer\Desktop\9-forkify\starter'
@ multi babel-polifill ./src/js/index.js main[0]
Child HtmlWebpackCompiler:
1 asset
Entrypoint HtmlWebpackPlugin_0 = __child-HtmlWebpackPlugin_0
[./node_modules/html-webpack-plugin/lib/loader.js!./src/index.html] 18.3 KiB {HtmlWebpackPlugin_0} [built]
npm ERR! code ELIFECYCLE
npm ERR! errno 2
npm ERR! [email protected] dev: webpack --mode development
npm ERR! Exit status 2
npm ERR!
npm ERR! Failed at the [email protected] dev script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR! C:\Users\Acer\AppData\Roaming\npm-cache_logs\2020-06-04T14_58_41_820Z-debug.log