Steps to reproduce:
- Create a structure with a separator field, called 'test'.
- Create a Display Template Page of type web content and subtype 'test', 'DP'.
- Create a 'test' web content 'WC', and set 'DP' as its display page.
- Create a widget page and add an Asset Publisher which displays 'WC'.
- Click on 'WC' to see its content.
Expected result: you can see 'WC''s content on its display page, 'DP'.
Actual result: A NullPointerException is thrown, and the UI shows an "Internal Server Error"