How to solve Github pages 404 problem when I use react router? - reactjs

Question

I try to deploy my typescript react app to Github pages, but every time when I access my URL, Github complains '404 there isn't a github pages site here.'
And I try to make my code simple, I just left the home page in my app, but it still complains.
If I don't use React router, it works. Why does it complain when I use react router?
My Code:
import Home from "./pages/Home" //rafce
import {
BrowserRouter,
Routes,
Route,
} from "react-router-dom";
const Router: React.FC = () => {
return <>
<BrowserRouter>
<Routes>
<Route path="/" ><Home /></Route>
</Routes>
</BrowserRouter>
</>
}
export default Router
My JSON:
{
"homepage": "http://lsk21007.github.io/ohno",
"name": "typescript-react",
"version": "0.1.0",
"private": true,
"dependencies": {
"#fortawesome/fontawesome-svg-core": "^6.1.1",
"#fortawesome/free-regular-svg-icons": "^6.1.1",
"#fortawesome/free-solid-svg-icons": "^6.1.1",
"#fortawesome/react-fontawesome": "^0.1.18",
"#testing-library/jest-dom": "^5.16.4",
"#testing-library/react": "^13.2.0",
"#testing-library/user-event": "^13.5.0",
"#types/jest": "^27.5.1",
"#types/node": "^16.11.36",
"#types/react": "^18.0.9",
"#types/react-dom": "^18.0.4",
"bootstrap": "^5.2.0-beta1",
"react": "^18.1.0",
"react-bootstrap": "^2.4.0",
"react-dom": "^18.1.0",
"react-router-dom": "^6.3.0",
"react-scripts": "5.0.1",
"styled-components": "^5.3.5",
"typescript": "^4.6.4",
"web-vitals": "^2.1.4"
},
"scripts": {
"predeploy": "npm run build",
"deploy": "gh-pages -d build",
"start": "react-scripts start",
"build": "react-scripts build",
"test": "react-scripts test",
"eject": "react-scripts eject"
},
"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": {
"#types/styled-components": "^5.1.25",
"gh-pages": "^4.0.0"
}
}
Thanks for your help!!