Steps:

1. Log in as Admin
2. Go to Content/Content structure and create a new Folder
3. Go to eZ Platform Locations tab
4. Mark it as hidden
5. Go to Admin/Roles/Editor and edit the policies as below:

• User/Login
• Content/Versionread
• Content/Create
• Content/Read, Content type: Article, Subtree of Location: /eZ Platform/Folder

6. Click edit button from Content/Read policy

Actual result:

There is an 500 error in dev mode: An exception has been thrown during the rendering of a template ("Location cannot be displayed as it is flagged as invisible.").
For prod mode it looks like in attachment.

Expected result:

Shouldn't it be editable? If I was able to set this policy, why I am not able to undo it? Or at least maybe there could be some user friendly message what is going on.