Package containing the bug

next (Drupal module)

Describe the bug

I've set-up the "module" following the documenation. When trying to get "Draft mode" to work. It seemed it was unable to select a "site".

The part next to red arrow didn't show due to an JS error.

This problem also occurs in "On-demand revalidation" with the "Path" option.

Expected behavior

The Site selector should be visible so that I am able to select a site.

Steps to reproduce:

1. go to: /admin/config/services/next/entity-types/node.article/edit?destination=/admin/config/services/next/entity-types
2. Click vertical tab "Draft-mode" select "Site selector" (for example)
3. See that the "Next.js sites" element doesn't show up.

Additional context

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