cy.visit("/{PATH}") returns 404 while the site is completely reachable and I don't see a 404.

[hamidmayeli]

I am testing a ViteJS + React. The test works fine. But I like to upgrade to react 19 and I am facing with 404 when visiting cy.visit("/login") or other pages. The repo is based on this template.

Here is the config

import { defineConfig } from "cypress";
import registerCodeCoverageTasks from "@cypress/code-coverage/task";

export default defineConfig({
  e2e: {
    viewportWidth: 960,
    screenshotOnRunFailure: true,
    video: true,
    retries: {
      runMode: 2,
    },
    baseUrl: "http://localhost:5173",
    setupNodeEvents(on, config) {
      registerCodeCoverageTasks(on, config);
      // implement node event listeners here

      return config;
    },
  },

  component: {
    viewportWidth: 960,
    screenshotOnRunFailure: false,
    retries: {
      runMode: 2,
    },
    video: false,
    devServer: {
      framework: "react",
      bundler: "vite",
    },
    setupNodeEvents(on, config) {
      registerCodeCoverageTasks(on, config);
      // implement node event listeners here

      return config;
    },
  },
});

and here is a sample test

describe("App", () => {
  it("can log in and out", () => {
    cy.visit("/");

    cy.visit("/login");
....

I also see a few error logs like queue.insert must be called with a valid index - the index (9) is out of bounds or (uncaught exception)TypeError: Cannot read properties of undefined (reading '_fired')