Al intentar generar las versiones RTL de los archivos CSS en el marco metronic con npm run build --rtl=true --demo1 , aparece el siguiente error:

 [webpack-cli] Failed to load '/home/user/Documents/Metronic v8.0.32/html/theme/tools/webpack.config.js' config [webpack-cli] ReferenceError: require is not defined at file:///home/user/Documents/Metronic%20v8.0.32/html/theme/tools/webpack.config.js:1:17 at ModuleJob.run (internal/modules/esm/module_job.js:145:37) at async Loader.import (internal/modules/esm/loader.js:182:24) at async WebpackCLI.tryRequireThenImport (/home/user/Documents/Metronic v8.0.32/html/theme/tools/node_modules/webpack-cli/lib/webpack-cli.js:254:18) at async loadConfigByPath (/home/user/Documents/Metronic v8.0.32/html/theme/tools/node_modules/webpack-cli/lib/webpack-cli.js:1710:19) at async WebpackCLI.loadConfig (/home/user/Documents/Metronic v8.0.32/html/theme/tools/node_modules/webpack-cli/lib/webpack-cli.js:1830:30) at async WebpackCLI.createCompiler (/home/user/Documents/Metronic v8.0.32/html/theme/tools/node_modules/webpack-cli/lib/webpack-cli.js:2185:18) at async WebpackCLI.runWebpack (/home/user/Documents/Metronic v8.0.32/html/theme/tools/node_modules/webpack-cli/lib/webpack-cli.js:2321:16) at async Command.<anonymous> (/home/user/Documents/Metronic v8.0.32/html/theme/tools/node_modules/webpack-cli/lib/webpack-cli.js:1058:13) at async Promise.all (index 1)

El archivo webpack.config.js es:

 const webpack = require('webpack'); const path = require('path'); const fs = require('fs'); const del = require('del'); const glob = require('glob'); const CopyWebpackPlugin = require('copy-webpack-plugin'); const MiniCssExtractPlugin = require('mini-css-extract-plugin'); const TerserJSPlugin = require('terser-webpack-plugin'); const CssMinimizerPlugin = require('css-minimizer-webpack-plugin'); const WebpackMessages = require('webpack-messages'); const ExcludeAssetsPlugin = require('webpack-exclude-assets-plugin'); const MergeIntoSingle = require('webpack-merge-and-include-globally/index'); const RtlCssPlugin = require('rtlcss-webpack-plugin'); . . .... module.exports = () => { return [mainConfig()]; };

¿Cómo puedo deshacerme de este error? Algunas otras preguntas sugieren algunos cambios en la sección module.exports , pero no resuelven el problema.