Hereby my steps:
Install
Drupal (with minimum)
Administration menu and Administration menu Toolbar style
Module filter

Contextual Administration (+ Page manager, Chaos tools modules)
Countries (+Entity API module)

Enable
• Field UI
• List
• Options
from Drupal Core

Create content type: Page
Add Country field (widget: Countries by continent)

Add new custom page (/admin/structure/pages/add): News
Path: news/%node/view (argument Node: ID)
Variant type: Context Admin
Optional features: Visible menu item (select Default menu tab Title: View)
Contextual administration type: View Node

Clone this page and change
Administrative title: News edit
Path: news/%node/edit
Content -> Contextual administration type: Edit Node
Menu -> Menu tab (Title: Edit Weight: 10)

Enable node_view page

Add new variant:
Administrative title: Redirect news
Response code: 301 Redirect
Selection rules: Node type -> page
Redirect destination: news/%node:nid

Create page from: node/add/page
Title Page one
From Continent select any continent
From Countries select any country
Click Save

You are redirected to /news/1
Click Edit Menu tab
Try to select any continent from Continent field

You’ll get

An AJAX HTTP error occurred.
HTTP Result Code: 200
Debugging information follows.
Path: /system/ajax
StatusText: OK
ResponseText:
Fatal error: Call to undefined function node_form_validate() in Z:\home\drupal.loc\www\includes\form.inc on line 1443