InvalidArgumentException: Cannot redirect to an empty URL. in Symfony

Had exactly the same thing today, Drupal 9.5.5.

1. Create a duplicate of the People view (user_admin_people)
2. Edit the duplicate
3. Change the path to say /people-search
4. Save the view
5. Got to admin/structure/views and see that the path for the duplicate view is "/" not "/people-search"
6. Log out and get "The website encountered an unexpected error. Please try again later." on homepage

I had the same issue on 9.5.8. A view had two page displays with different urls:

```
/dashboard-my-applications
/dashboard/my-applications/applications
```

`/dashboard-my-applications` is presented as `/` in the views overview, but seemed to be correctly configured when editing the view. As these page displays were completely identical, removing the first one solved the issue for me.

Using Drupal 9.5.11, I had the issue with WSOD when logging out. Log message said:

InvalidArgumentException: Cannot redirect to an empty URL. in Symfony\Component\HttpFoundation\RedirectResponse->setTargetUrl() (line 91 of C:\Users\blabla\Sites\mydrupalsite\vendor\symfony\http-foundation\RedirectResponse.php).

When looking inside the view that caused the problem, the paths were correct, but from the /admin/structure/views page, one of the displays in my view was listed as Page (/).

The reason the problem was created in the first place, was probably that I had messed to much with creating menu tabs in my view. Saving all page paths in the view displays as "Normal menu entry" finally cleared the missing path.

Same issue for me as with #33: https://www.drupal.org/project/redirect/issues/3447718#comment-15736214 🐛 Cannot redirect to an empty URL Needs review