For older vite, you can try to copy paste this rather than install this plugin.

[chaosprint]

import { defineConfig } from 'vite';

export default defineConfig({
  plugins: [
    {
      name: 'configure-server',
      configureServer(server) {
        server.middlewares.use((_req, res, next) => {
          res.setHeader("Cross-Origin-Opener-Policy", "same-origin");
          res.setHeader("Cross-Origin-Embedder-Policy", "require-corp");
          next();
        });
      }
    },
    // you other plugins
  ]
});