What does the error "webpack-cli error cannot find module 'del'" typically indicate?

This error signifies that your Webpack configuration, or one of its plugins/loaders, is trying to use the 'del' package (a module for deleting files and folders) but it cannot be located in your project's `node_modules` directory. This usually means 'del' was not installed, or it was installed incorrectly, or its `node_modules` directory is corrupted, preventing Webpack from finding it during the build process.