Lionel Dong

I get this same problem now when I try to upgrade `webpack` from v4 to v5. As @Christian24's detail, I have also use the multiple configs: https://webpack.js.org/configuration/configuration-types/#exporting-multiple-configurations, and works well...

> @1950195 that is because you have multiple `devServer` options. One will work across all configurations Yes, agree. I’m trying to separate the different projects from one webpack config file...