Question 73258 in Reactjs Question posted in
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Error: PostCSS received undefined instead of CSS string but Locally Doesnt – Reactjs

I had an error while building my react app test environment but in locally I build it successfully.

An error: Module build failed (from ./node_modules/css-loader/dist/cjs.js): Error: PostCSS received undefined instead of CSS string

In my local versions are; Node: 13.14.0, NPM: 6.14.4
Test environment versions are; Node: 12.22.12, NPM: 6.14.16

React:17.0.2

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Answers


  1. Chosen as BEST ANSWER
    0

    npm install --save-dev [email protected] without "^" solved my issue


  2. 0

    Probably it’s related to this error https://www.drupal.org/project/bootstrap_sass/issues/3347384.
    As the comments says need to downgrade sass to [email protected].3

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