Disclaimer: this is not a fix but rather a quick hack, so that, for instance, you might continue building.
Problem: You’ve just installed TailwindCSS but you get the error below as well as some indication that it might related to the PostCSS config.
$ [postcss] Cannot read properties of undefined (reading 'config')
$ [vite] Internal server error: [postcss] Cannot read properties of undefined (reading 'config')
Quick Hack: Copy the content of module.export in the tailwind.config.js file into the value of the tailwindcss property in the postcss.config.js file. Your final result should look like this:
./postcss.config.js
1 module.exports = {
2 plugins: {
3 tailwindcss: {
4 content: [
5 "./index.html",
6 "./src/**/*.{vue,js,ts,jsx,tsx}",
7 ],
8 theme: {
9 extend: {},
10 },
11 plugins: [
12 require('@tailwindcss/forms'),
13 ],
14 },
15 autoprefixer: {},
16 },
17 }
That should do the hack. Cheers.