Cannot set category with sort

[michal-josef-spacek]

When i am putting category name to input box, i cannot set sort option in "CATEGORY|sort" form.

There is exception like:

Exception in thread "Thread-13" java.lang.IllegalArgumentException: Gravestones in Jihlava District|sort is an illegal title
        at org.wikipedia.Wiki.normalize(Wiki.java:8611)
        at org.wikipedia.Wiki.listPages(Wiki.java:6207)
        at org.wikipedia.Wiki.listPages(Wiki.java:6166)
        at cuploader.CategoryHint.loadCategories(CategoryHint.java:111)
        at cuploader.CategoryHint.run(CategoryHint.java:48)