Wiki plugin - Page not found when a parent is defined

From a working wiki page, if I defined a parent and click on view wiki I've got the following message instead of my wiki content: "Wiki page you are looking for does not exist. Feel free to create it yourself."

Any idea?
Thx

    Alexander

    Hi @gilbert,

    I've tested this, but was not able to reproduce it. There are a few things we can try.

    First, can you please try resetting your Permalinks? You can do this by going to "Settings -> Permalinks" and clicking "save" WordPress caches it's permalink rules for performance, and some events may cause them to become corrupt. This action will clear the cache and allow them to rebuild. You should also be using one of the "pretty permalink" options such as "postname"

    Next, can you try testing for a theme conflict? Just switch to TwentyThirteen temporarily and let me know if this makes a difference.

    Best regards,