Error en: const data = await res.json()

Server Error
TypeError: terminated
This error happened while generating the page. Any console logs will be displayed in the terminal window.
Este es mi código:
import Link from 'next/link';
export async function getStaticProps() {
 console.log('Iniciamos')
 const res = await fetch ('http://127.0.0.1:8000/api/books')
 console.log('sali del fetch')
 console.log(res)
 console.log('----')
 const data = await res.json()
 
 return {
 props: {
 books: data
 }
 }
}

Response {
  [Symbol(realm)]: null,
  [Symbol(state)]: {
    aborted: false,
    rangeRequested: false,
    timingAllowPassed: true,
    requestIncludesCredentials: true,
    type: 'default',
    status: 200,
    timingInfo: {
      startTime: 326072.3169000149,
      redirectStartTime: 0,
      redirectEndTime: 0,
      postRedirectStartTime: 326072.3169000149,
      finalServiceWorkerStartTime: 0,
      finalNetworkResponseStartTime: 0,
      finalNetworkRequestStartTime: 0,
      endTime: 0,
      encodedBodySize: 349,
      decodedBodySize: 349,
      finalConnectionTimingInfo: null
    },
    cacheState: '',
    statusText: 'OK',
    headersList: HeadersList {
      [Symbol(headers map)]: [Map],
      [Symbol(headers map sorted)]: null
    },
    urlList: [ [URL] ],
    body: { stream: undefined }
  },
  [Symbol(headers)]: HeadersList {
    [Symbol(headers map)]: Map(9) {
      'host' => '127.0.0.1:8000',
      'date' => 'Fri, 23 Dec 2022 20:34:57 GMT, Fri, 23 Dec 2022 20:34:57 GMT',
      'connection' => 'close',
      'x-powered-by' => 'PHP/8.1.6',
      'cache-control' => 'no-cache, private',
      'content-type' => 'application/json',
      'x-ratelimit-limit' => '60',
      'x-ratelimit-remaining' => '59',
      'access-control-allow-origin' => '*'
    },
    [Symbol(headers map sorted)]: null
  }
}

error - TypeError: terminated
    at Fetch.onAborted (node:internal/deps/undici/undici:11000:53)
    at Fetch.emit (node:events:513:28)
    at Fetch.terminate (node:internal/deps/undici/undici:10272:14)
    at Object.onError (node:internal/deps/undici/undici:11095:36)
    at Request.onError (node:internal/deps/undici/undici:6477:31)
    at errorRequest (node:internal/deps/undici/undici:8440:17)
    at Socket.onSocketClose (node:internal/deps/undici/undici:7895:9)
    at Socket.emit (node:events:513:28)
    at TCP.<anonymous> (node:net:313:12) {
  page: '/libros',
  [cause]: SocketError: closed
      at Socket.onSocketClose (node:internal/deps/undici/undici:7883:35)
      at Socket.emit (node:events:513:28)
      at TCP.<anonymous> (node:net:313:12) {
    code: 'UND_ERR_SOCKET',
    socket: {
      localAddress: undefined,
      localPort: undefined,
      remoteAddress: undefined,
      remotePort: undefined,
      remoteFamily: undefined,
      timeout: undefined,
      bytesWritten: 180,
      bytesRead: 656
    }
  }
}
error - TypeError: terminated
    at Fetch.onAborted (node:internal/deps/undici/undici:11000:53)
    at Fetch.emit (node:events:513:28)
    at Fetch.terminate (node:internal/deps/undici/undici:10272:14)
    at Object.onError (node:internal/deps/undici/undici:11095:36)
    at Request.onError (node:internal/deps/undici/undici:6477:31)
    at errorRequest (node:internal/deps/undici/undici:8440:17)
    at Socket.onSocketClose (node:internal/deps/undici/undici:7895:9)
    at Socket.emit (node:events:513:28)
    at TCP.<anonymous> (node:net:313:12) {
  page: '/libros',
  [cause]: SocketError: closed
      at Socket.onSocketClose (node:internal/deps/undici/undici:7883:35)
      at Socket.emit (node:events:513:28)
      at TCP.<anonymous> (node:net:313:12) {
    code: 'UND_ERR_SOCKET',
    socket: {
      localAddress: undefined,
      localPort: undefined,
      remoteAddress: undefined,
      remotePort: undefined,
      remoteFamily: undefined,
      timeout: undefined,
      bytesWritten: 180,
      bytesRead: 656
    }
  }
}