pages 또는 앱 디렉토리를 찾을 수 없음 에러

- ready started server on 0.0.0.0:3000, url: http://localhost:3000
Error: > Couldn't find any `pages` or `app` directory. Please create one under the project root
    at findPagesDir (C:\Users\USER\Desktop\1080\react\front\node_modules\next\dist\lib\find-pages-dir.js:54:15)
    at DevServer.getRoutes (C:\Users\USER\Desktop\1080\react\front\node_modules\next\dist\server\dev\next-dev-server.js:191:71)
    at new Server (C:\Users\USER\Desktop\1080\react\front\node_modules\next\dist\server\base-server.js:198:47)
    at new NextNodeServer (C:\Users\USER\Desktop\1080\react\front\node_modules\next\dist\server\next-server.js:175:9)
    at new DevServer (C:\Users\USER\Desktop\1080\react\front\node_modules\next\dist\server\dev\next-dev-server.js:149:9)
    at NextServer.createServer (C:\Users\USER\Desktop\1080\react\front\node_modules\next\dist\server\next.js:179:24)
    at C:\Users\USER\Desktop\1080\react\front\node_modules\next\dist\server\next.js:200:42
    at async NextServer.prepare (C:\Users\USER\Desktop\1080\react\front\node_modules\next\dist\server\next.js:161:24)
    at async Server.<anonymous> (C:\Users\USER\Desktop\1080\react\front\node_modules\next\dist\server\lib\render-server.js:128:17) {
  type: 'Error'

npm run dev를 했을 때 이런식으로 뜨는데 어떻게 해야 하나요??