Why is the project not being built on React?

Question

React

I'm trying to build a project and upload it to GitHub Pages, but an error occurs, please tell me what the problem is.
Here is my package.jeson

{
  "name": "portfolio",
  "version": "0.1.0",
  "private": true,
  "homepage": "https://vitalik9135eb2.github.io/Portfolio/",
  "dependencies": {
    "@testing-library/jest-dom": "^5.11.4",
    "@testing-library/react": "^11.1.0",
    "@testing-library/user-event": "^12.1.10",
    "node-sass": "^6.0.1",
    "react": "^17.0.2",
    "react-dom": "^17.0.2",
    "react-icons": "^4.2.0",
    "react-router-dom": "^5.2.0",
    "react-scripts": "4.0.3",
    "react-spring": "^9.2.3",
    "react-transition-group": "^4.4.2",
    "web-vitals": "^1.0.1"
  },
  "scripts": {
    "start": "react-scripts start",
    "build": "react-scripts build",
    "test": "react-scripts test",
    "eject": "react-scripts eject",
    "predeploy": "npm run build",
    "deploy": "gh-pages -d build"
  },
  "eslintConfig": {
    "extends": [
      "react-app",
      "react-app/jest"
    ]
  },
  "browserslist": {
    "production": [
      ">0.2%",
      "not dead",
      "not op_mini all"
    ],
    "development": [
      "last 1 chrome version",
      "last 1 firefox version",
      "last 1 safari version"
    ]
  },
  "devDependencies": {
    "css-loader": "^5.2.6",
    "gh-pages": "^3.2.3",
    "sass-loader": "^12.1.0",
    "style-loader": "^3.0.0"
  }
}

Here is the error:

Creating an optimized production build...
Failed to compile.

Cannot read property 'type' of undefined
CompileError: Begins at CSS selector undefined

npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! [email protected] build: `react-scripts build`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the [email protected] 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\Asus\AppData\Roaming\npm-cache\_logs\2021-08-28T16_27_56_788Z-debug.log
PS E:\react\portfolio>