Quasar v2 - Packaging the app causes a CSS minimizer error - electron

Question

I have just recently upgraded my applications to Quasar v2. When I tried building an Electron package though, I get an error with the Css Minimizer plugin:
App • DONE • "Renderer" compiled with errors • 83231ms
App • ERROR • Renderer in css/vendor.css
css/vendor.css from Css Minimizer plugin
TypeError: Cannot set properties of undefined (setting 'attribute')
at C:\Users\mememe\Desktop\NodeJS\branches\wc_mememe\Electron\app-dev\rsa-ecc-certificate-tool\css\vendor.css:115:1
at Object.attribute (C:\Users\mememe\Desktop\NodeJS\node_modules\postcss-minify-selectors\dist\index.js:48:34)
at C:\Users\mememe\Desktop\NodeJS\node_modules\postcss-minify-selectors\dist\index.js:186:27
at C:\Users\mememe\Desktop\NodeJS\node_modules\postcss-minify-selectors\node_modules\postcss-selector-parser\dist\selectors\container.js:176:26
at Selector.each (C:\Users\mememe\Desktop\NodeJS\node_modules\postcss-minify-selectors\node_modules\postcss-selector-parser\dist\selectors\container.js:159:22)
at Selector.walk (C:\Users\mememe\Desktop\NodeJS\node_modules\postcss-minify-selectors\node_modules\postcss-selector-parser\dist\selectors\container.js:175:21)
at C:\Users\mememe\Desktop\NodeJS\node_modules\postcss-minify-selectors\node_modules\postcss-selector-parser\dist\selectors\container.js:179:31
at Root.each (C:\Users\mememe\Desktop\NodeJS\node_modules\postcss-minify-selectors\node_modules\postcss-selector-parser\dist\selectors\container.js:159:22)
at Root.walk (C:\Users\mememe\Desktop\NodeJS\node_modules\postcss-minify-selectors\node_modules\postcss-selector-parser\dist\selectors\container.js:175:21)
at Processor.func (C:\Users\mememe\Desktop\NodeJS\node_modules\postcss-minify-selectors\dist\index.js:178:19)
at Processor._runSync (C:\Users\mememe\Desktop\NodeJS\node_modules\postcss-minify-selectors\node_modules\postcss-selector-parser\dist\processor.js:84:30)
I followed the upgrade guide to v2 but I may have missed something. Any suggestions on what can I check to get past this error?
I also get the same error when I try building it for PWA.
Versions that I am using:
NodeJs - 16.13.1
Global packages
NPM - 8.1.2
yarn - Not installed
#quasar/cli - 1.2.2
#quasar/icongenie - Not installed
cordova - Not installed
Important local packages
quasar - 2.3.4 -- Build high-performance VueJS user interfaces (SPA, PWA, SSR, Mobile and Desktop) in record time
#quasar/app - 3.2.5 -- Quasar Framework local CLI
#quasar/extras - 1.12.2 -- Quasar Framework fonts, icons and animations
eslint-plugin-quasar - Not installed
vue - 3.2.24 -- The progressive JavaScript framework for buiding modern web UI.
vue-router - 4.0.12 -- > This is the repository for Vue Router 4 (for Vue 3)
vuex - 4.0.2 -- state management for Vue.js
electron - 16.0.4 -- Build cross platform desktop apps with JavaScript, HTML, and CSS
electron-packager - 15.2.0 -- Customize and package your Electron app with OS-specific bundles (.app, .exe, etc.) via JS or CLI
electron-builder - Not installed
#babel/core - 7.16.0 -- Babel compiler core.
webpack - 5.65.0 -- Packs CommonJs/AMD modules for the browser. Allows to split your codebase into multiple bundles, which can be loaded on demand. Support loaders to preprocess files, i.e. json, jsx, es7, css, less, ... and your custom stuff.
webpack-dev-server - 4.6.0 -- Serves a webpack app. Updates the browser on changes.
workbox-webpack-plugin - 4.3.1 -- A plugin for your Webpack build process, helping you generate a manifest of local files that workbox-sw should precache.
register-service-worker - 1.7.2 -- Script for registering service worker, with hooks
typescript - 4.4.2 -- TypeScript is a language for application scale JavaScript development
#capacitor/core - Not installed
#capacitor/cli - Not installed
#capacitor/android - Not installed
#capacitor/ios - Not installed
Quasar App Extensions
*None installed*
Any help will be very much appreciated.
Thanks!