I am migrating from Page Router to App router.

From

pages
  - 500.tsx

to

app
  - 500
     - page.tsx

However when I run yarn build/next build, below error shows

> Build error occurred
[Error: ENOENT: no such file or directory, rename '/Users/CCC/Desktop/SourceTree/my-frontend/.next/export/500.html' -> '/Users/CCC/Desktop/SourceTree/my-frontend/.next/server/pages/500.html'] {
  errno: -2,
  code: 'ENOENT',
  syscall: 'rename',
  path: '/Users/CCC/Desktop/SourceTree/my-frontend/.next/export/500.html',
  dest: '/Users/CCC/Desktop/SourceTree/my-frontend/.next/server/pages/500.html'
}
error Command failed with exit code 1.

I tried to remove .next folder and rebuild again, but it still doesn’t work. What is happening?