I am trying to convert my existing Vue CLI project to use Vite instead but running it I get the following error:

  VITE v5.1.4  ready in 345 ms

  ➜  Local:   http://localhost:5173/
  ➜  Network: use --host to expose
  ➜  press h + enter to show help
Error: The following dependencies are imported but could not be resolved:

  axios (imported by /mnt/500GB/calcani/founders/founders/front/src/views/UpgradeView.vue?id=0)
  register-service-worker (imported by /mnt/500GB/calcani/founders/founders/front/src/registerServiceWorker.js)
  vue-router (imported by /mnt/500GB/calcani/founders/founders/front/src/views/UpgradeView.vue?id=0)
  @/components/SiteHeader (imported by /mnt/500GB/calcani/founders/founders/front/src/App.vue?id=0)
  @/components/SiteFooter (imported by /mnt/500GB/calcani/founders/founders/front/src/App.vue?id=0)
  @/components/Help (imported by /mnt/500GB/calcani/founders/founders/front/src/App.vue?id=0)
  @/components/CreatePost (imported by /mnt/500GB/calcani/founders/founders/front/src/App.vue?id=0)
  @/components/CreateProject (imported by /mnt/500GB/calcani/founders/founders/front/src/App.vue?id=0)
  @/stores/founders (imported by /mnt/500GB/calcani/founders/founders/front/src/views/HomeView.vue?id=0)
  @/assets/css/styles.css (imported by /mnt/500GB/calcani/founders/founders/front/src/App.vue?id=0)
  vue3-tabs-component (imported by /mnt/500GB/calcani/founders/founders/front/src/views/DirectoryView.vue?id=0)
  @/components/RightAds (imported by /mnt/500GB/calcani/founders/founders/front/src/views/HomeView.vue?id=0)
  lodash (imported by /mnt/500GB/calcani/founders/founders/front/src/views/MailView.vue?id=0)
  @/components/PostActions (imported by /mnt/500GB/calcani/founders/founders/front/src/views/HomeView.vue?id=0)
  @/components/SideMenu (imported by /mnt/500GB/calcani/founders/founders/front/src/views/HomeView.vue?id=0)
  @/components/CreateAd (imported by /mnt/500GB/calcani/founders/founders/front/src/views/AdvertiseView.vue?id=0)
  @/components/SendMessage (imported by /mnt/500GB/calcani/founders/founders/front/src/views/ProfileView.vue?id=0)
  @/composables/utilities (imported by /mnt/500GB/calcani/founders/founders/front/src/views/EditProfileView.vue?id=0)
  @/components/LeftAds (imported by /mnt/500GB/calcani/founders/founders/front/src/views/HomeView.vue?id=0)
  @/components/Pay (imported by /mnt/500GB/calcani/founders/founders/front/src/views/UpgradeView.vue?id=0)
  @/composables/locations (imported by /mnt/500GB/calcani/founders/founders/front/src/views/ProjectView.vue?id=0)
  @/components/ReportPost (imported by /mnt/500GB/calcani/founders/founders/front/src/views/ProfileView.vue?id=0)

Are they installed?
    at file:///mnt/500GB/calcani/founders/founders/front/node_modules/vite/dist/node/chunks/dep-jDlpJiMN.js:52270:23
    at process.processTicksAndRejections (node:internal/process/task_queues:95:5)
    at async file:///mnt/500GB/calcani/founders/founders/front/node_modules/vite/dist/node/chunks/dep-jDlpJiMN.js:51682:38

Why are the files not being resolved and what do I need to do to resolve them?

Here is my main.js file:

import axios from "axios";
import { createApp } from "vue";
import { createPinia } from "pinia";
import App from "./App.vue";
import router from "./router";
import "./registerServiceWorker.js";

axios.defaults.baseURL = "http://localhost:8000";
axios.defaults.xsrfHeaderName = "X-CSRFToken";
axios.defaults.xsrfCookieName = "csrftoken";
axios.defaults.withCredentials = true;
axios.defaults.withXSRFToken = true;

const pinia = createPinia();

const app = createApp(App);
app.use(router);
app.use(pinia);
app.mount("#app");