I mean it dependencies have updated A lot and there are many breaking changes ```copy-webpack-plugin ^5.0.0 → ^11.0.0 webpack ^4.29.3 → ^5.74.0 webpack-cli ^3.1.0 → ^4.10.0 webpack-dev-server ^3.1.5 → ^4.11.1 ``` I guess you shouldn't have used webpack then 😝 simply use --target web I suppose.