TypeError: Invalid PostCSS Plugin found at: plugins[0]

[brunoamaral]

I'm trying to build a site inside a docker container, but it's throwing out the error

TypeError: Invalid PostCSS Plugin found at: plugins[0] (@/src/themes/docsy/postcss.config.js)

I am pretty sure this was working in the past, and I made sure to run the npm commands mentioned in the documentation. Where should I look at to resolve this?

[tdufaure]

Same problem here as I decided to update everything (hugo, docsy theme, npm packages).
For the following test I created a new hugo site and made a clean git clone of the theme repo.

tstdocsy git:(master) ✗ hugo version
Hugo Static Site Generator v0.75.1-A4A7BAB7/extended linux/amd64 BuildDate: 2020-09-15T06:57:20Z

npm list autoprefixer
npm info using npm@6.14.6
npm info using node@v12.18.4
/workspaces/gitd4ta/tstdocsy
└── autoprefixer@10.0.0
npm list postcss-cli
/workspaces/gitd4ta/tstdocsy
└── postcss-cli@7.1.2

hugo --verbose
INFO 2020/09/16 17:41:03 postcss: use config file /workspaces/gitd4ta/tstdocsy/themes/docsy/postcss.config.js
INFO 2020/09/16 17:41:20 postcss: TypeError: Invalid PostCSS Plugin found at: plugins[0]

In fact it seems to be related to this version 10 of autoprefixer.

With npm install --save autoprefixer@9.8.6, hugo runs just fine. Can you give it a try @brunoamaral ?

au revoir,

[brunoamaral]

Thank you @tdufaure it looks like that was it.

I am seeing a new error, but it's regarding postCSS so it's not related to this one, right?

[tdufaure]

which error do you see now ?

[brunoamaral]

Error: Error building site: TOCSS: failed to transform "scss/main.scss" (text/x-scss): SCSS processing failed: file "/src/themes/docsy/assets/scss/_boxes.scss", line 37, col 18: wrong number of arguments (3 for 2) for `bg-gradient-variant' 

I am trying to update dependencies to see if it fixes it.

[aimeeu]

I'm getting the same error. @brunoamaral did you find a solution?

Error: Error building site: TOCSS: failed to transform "scss/main.scss" (text/x-scss): SCSS processing failed: file "/src/themes/docsy/assets/scss/_boxes.scss", line 37, col 18: wrong number of arguments (3 for 2) for `bg-gradient-variant' 

[brunoamaral]

@aimeeu if I remember correctly it was solved when I upgraded dependencies.

[devboldium]

Based on @brunoamaral 's reply, I updated postcss-cli and it fixed my issue

[chalin]

This has been open for a while. I'm going to assume that the final problem that you report is a duplicate of #464, which you can resolve by upgrading Node. For details see, Install/Upgrade Node.js. I'll close this for now, if you still have the problem, please create a new issue.