https://www.drupal.org/project/drupal/issues/2743633
Creating and removing fields result in a 404 error [#2743633] | Drupal.org
Jun 7, 2016 - I have a thing, that when I create a new field I get a 404 error. The field is actually created, and when I go back I see it, so this part is just a little...
in a