How to reproduce:
- Consider C1 site with multiple languages( e.g. English and Danish)
-
One of the languages(usually default language) can have empty "URL mapping name" property (for example, English).
Danish language has "URL mapping name" = de
So C1 URLs e.g. to the home page will be like this:
English: http://localhost/home.aspx
Danish: http://localhost/de/home.aspx
-
Enable NiceURLs
NiceURLs will not work correctly for English language. (but if English language also has "URL mapping name" , e.g 'en', then it works as expected)