Bug report

Describe the bug

At least two of the NextJS examples do not work when run "out of the box".

To Reproduce

1. Follow the steps in either of these two READMEs:
   • nextjs-with-typescript
   • hello-world
2. Run npm install && npm run dev.
   • React will report "Unexpected fiber popped" and "Unexpected pop" in the console.
   • In the Material UI example, buttons will not demonstrate the ripple effect when clicked. In my application, the effects are more severe, leading to loss of interactivity.
3. Deploy using npx now. Resulting application will report errors.
   • nextjs-with-typescript deployment
   • hello-world deployment

Expected behavior

Given examples work when deployed and run.

Screenshots

If applicable, add screenshots to help explain your problem.

System information

• OS
  • Development: Ubuntu 18.04 LTS
  • Deployment: Zeit Now platform
• Browser: Reproducible in Chrome and Firefox
• Version of Next.js: 9.0.6 (current latest)