I have encountered an error when using the latest version of Webpack (5.1.0). It looks like the configuration is throwing an error because the validation schema is too restrictive. Here is my webpack configuration file in a gist, and the error message I am seeing. Webpack.config.js https://gist.github.com/adarshbhat/3ec5950b66b78102da0cf46e51a3d633 Error I am attempting to use a parser generator library (antlr4) that works