Next.js build error 'Invalid declaration: U as UserConfig, P as Plugin' after moving Tailwind CSS files

I was working with:

https://github.com/TailAdmin/tailadmin-free-tailwind-dashboard-template

so a free template with NextJS template. When i download it and run it works just fine. I reorganize the files- just move the files into different folder and refactor. After moving files, i get:

Error: Invalid declaration: `U as UserConfig, P as Plugin`
./app/dashboard/globals.css.webpack[javascript/auto]!=!./node_modules/next/dist/build/webpack/loaders/css-loader/src/index.js??ruleSet[1].rules[13].oneOf[10].use[2]!./node_modules/next/dist/build/webpack/loaders/postcss-loader/src/index.js??ruleSet[1].rules[13].oneOf[10].use[3]!./app/dashboard/globals.css
Error: Invalid declaration: U as UserConfig, P as Plugin
at async Promise.all (index 0)

Heres the folder structure:

    Directory: C:\Users\user\Desktop\client-test\dashboard\client
Mode                 LastWriteTime         Length Name

d-----         6/12/2025  10:46 AM                .idea
d-----         6/12/2025  10:47 AM                .next
d-----         6/12/2025  10:46 AM                app
d-----         6/12/2025  10:45 AM                assets
d-----         6/12/2025  10:44 AM                components
d-----         6/12/2025  10:47 AM                node_modules

d-----         6/12/2025  10:41 AM                public
d-----         6/12/2025  10:45 AM                shared
-a----         6/12/2025   9:56 AM             43 .eslintrc.json
-a----         6/12/2025   9:56 AM            435 .gitignore
-a----         6/12/2025   9:56 AM        1430718 banner.png

-a----         6/12/2025   9:56 AM            409 eslint.config.mjs
-a----         6/12/2025   9:56 AM             97 jsvectormap.d.ts
-a----         6/12/2025   9:56 AM           1087 LICENSE
-a----         6/12/2025  10:42 AM            216 next-env.d.ts
-a----         6/12/2025   9:56 AM            282 next.config.ts
-a----         6/12/2025  10:47 AM         330777 package-lock.json
-a----         6/12/2025   9:56 AM           1680 package.json
-a----         6/12/2025   9:56 AM             77 postcss.config.js
-a----         6/12/2025   9:56 AM             68 prettier.config.js
-a----         6/12/2025   9:56 AM           6480 README.md
-a----         6/12/2025   9:56 AM            241 svg.d.ts

-a----         6/12/2025   9:56 AM            629 tsconfig.json

Deleting the cache:

Remove-Item -Recurse -Force .next, node_modules, package-lock.json

Doesnt fix the error.

The error is after moving the files! I didnt change anything in any files. Why i get this error? How to fix it?