Me sale este error, ya revise los archivos de package.json y los 2 webpack y estan tal cual los tiene Oscar. Ayuda!!! <code>$ npm run bui...

Me sale este error, ya revise los archivos de package.json y los 2 webpack y estan tal cual los tiene Oscar. Ayuda!!!

$ npm run build

> platzi-store@1.0.0 build H:\Platzi\Escuela de Desarrollo Web\Curso Práctico de Webpack\Project\platzi-store
> webpack --mode production --config webpack.config.js

assets by status 169 KiB [cached] 3 assets
Entrypoint main = assets/main.css bundle.js
orphan modules 162 KiB [orphan] 56 modules
runtime modules 884 bytes 4 modules
cacheable modules 309 KiB (javascript) 2.17 KiB (css/mini-extract)     
  javascript modules 309 KiB
    modules by path ./node_modules/prop-types/ 2.58 KiB 3 modules      
    modules by path ./node_modules/react/ 6.48 KiB 2 modules
    modules by path ./node_modules/react-dom/ 119 KiB 2 modules        
    modules by path ./node_modules/scheduler/ 4.91 KiB 2 modules       
    modules by path ./node_modules/react-is/ 2.69 KiB 2 modules        
  modules by path ./src/styles/components/ 2.17 KiB 6 modules

ERROR in assets/main.css
assets/main.css from Css Minimizer
Error: PostCSS plugin postcss-discard-comments requires PostCSS 8.     
Migration guide for end-users:
https://github.com/postcss/postcss/wiki/PostCSS-8-for-end-users        
    at Processor.normalize (H:\Platzi\Escuela de Desarrollo Web\Curso Práctico de Webpack\Project\platzi-store\node_modules\postcss\lib\processor.js:167:15)
    at new Processor (H:\Platzi\Escuela de Desarrollo Web\Curso Práctico de Webpack\Project\platzi-store\node_modules\postcss\lib\processor.js:56:25)
    at postcss (H:\Platzi\Escuela de Desarrollo Web\Curso Práctico de Webpack\Project\platzi-store\node_modules\postcss\lib\postcss.js:55:10) 
    at cssnanoPlugin (H:\Platzi\Escuela de Desarrollo Web\Curso Práctico de Webpack\Project\platzi-store\node_modules\cssnano\dist\index.js:145:31)
    at cssnanoMinify (eval at transform (H:\Platzi\Escuela de Desarrollo Web\Curso Práctico de Webpack\Project\platzi-store\node_modules\css-minimizer-webpack-plugin\dist\minify.js:34:28), <anonymous>:49:33)      
    at minify (H:\Platzi\Escuela de Desarrollo Web\Curso Práctico de Webpack\Project\platzi-store\node_modules\css-minimizer-webpack-plugin\dist\minify.js:15:32)
    at Object.transform (H:\Platzi\Escuela de Desarrollo Web\Curso Práctico de Webpack\Project\platzi-store\node_modules\css-minimizer-webpack-plugin\dist\minify.js:35:24)
    at execFunction (H:\Platzi\Escuela de Desarrollo Web\Curso Práctico de Webpack\Project\platzi-store\node_modules\jest-worker\build\workers\threadChild.js:158:17)
    at execHelper (H:\Platzi\Escuela de Desarrollo Web\Curso Práctico de Webpack\Project\platzi-store\node_modules\jest-worker\build\workers\threadChild.js:137:5)
    at execMethod (H:\Platzi\Escuela de Desarrollo Web\Curso Práctico de Webpack\Project\platzi-store\node_modules\jest-worker\build\workers\threadChild.js:141:5)

webpack 5.48.0 compiled with 1 error in 7431 ms
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! platzi-store@1.0.0 build: `webpack --mode production --config webpack.config.js`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the platzi-store@1.0.0 build script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!     C:\Users\Nerak\AppData\Roaming\npm-cache\_logs\2021-08-05T22_10_22_328Z-debug.log