Cannot set property 'parent' of undefined when plugins added

[merelinguist]

I’m currently trying to integrate this with a Next.js project, but am receiving this error:

error - ./node_modules/tailwindcss/tailwind.css ((webpack)/css-loader/cjs.js??ref--5-oneOf-5-1!(webpack)/postcss-loader/cjs.js??ref--5-oneOf-5-2!./node_modules/tailwindcss/tailwind.css)
TypeError: Cannot set property 'parent' of undefined

I can’t seem to reproduce it, but strangely when I remove the plugins from my Tailwind config, Next happily compiles: https://github.com/merelinguist/strove/blob/39a64dc7ef32c36742446e9716cb4781d83d1fcf/tailwind.config.js#L14-L18.

[chriswdmr]

Try updating to the latest postcss, I also had this issue but updating it, resolved it for me:
npm install -D postcss@latest

[merelinguist]

Try updating to the latest postcss, I also had this issue but updating it, resolved it for me:
npm install -D postcss@latest

This fixed it for me too.

[mwarger]

@merelinguist @chriswdmr Would you be able to share more of your config or versions? I'm still getting the same error after updating to the latest postcss version.

[elie222]

Facing same issue. He shared his project in the original post: merelinguist/strove-old@39a64dc/tailwind.config.js#L14-L18