Adding role-specific preview permission to blueprint results in Panel error

[pReya]

Description

By adding this to my page blueprint

options:
  preview:
    ncuser: true

I get the following error in the panel:

Kirby\Cms\PageBlueprint::preview(): Return value must be of type string|bool, array returned

Any other permissions work fine, e.g. if I add

options:
  update:
    ncuser: true

everything works fine. It's just the preview option that triggers this error.

Expected behavior

Panel should load just fine.

Screenshots

To reproduce

1. Download plainkit
2. Create any user blueprint (e.g. users/ncuser.yml)
3. Add the code above to any page blueprint
4. See error in panel

Your setup

Kirby Version
4.1.2

[distantnative]

@bastianallgeier Do you remember why this is called internally via PageBlueprint? Shouldn't it rather somehow be involved with PagePermissions to support role-based config?

@pReya Currently this is not just a type-hinting bug, but the preview options really supports only a boolean value or a string to overwrite the default preview url.

[pReya]

@bastianallgeier Do you remember why this is called internally via PageBlueprint? Shouldn't it rather somehow be involved with PagePermissions to support role-based config?

@pReya Currently this is not just a type-hinting bug, but the preview options really supports only a boolean value or a string to overwrite the default preview url.

I guess then it's rather a bug in the documentation. Because it says You can control each option for pages, files and users in blueprints with fine-grained permissions based on user role: (taken from here)