Generating static pages (0/12)  [    ]
TypeError: fetch failed
    at node:internal/deps/undici/undici:12345:11
    at process.processTicksAndRejections (node:internal/process/task_queues:95:5)
    at async globalThis.fetch (C:\Users\...\frontend\.next\server\chunks\638.js:1:36415)
    at async p (C:\Users\...\frontend\.next\server\app\page.js:1:24795)
    at async m (C:\Users\...\frontend\.next\server\app\page.js:1:24901) {
  cause: AggregateError
      at internalConnectMultiple (node:net:1114:18)
      at afterConnectMultiple (node:net:1667:5)
      at TCPConnectWrap.callbackTrampoline (node:internal/async_hooks:130:17) {
    code: 'ECONNREFUSED',
    [errors]: [ [Error], [Error] ]
  }
}

i get that error when i do npm run build, the app works fine when i run it with npm run dev but when i build it, i get that error