Question Error when Birthday module enabled on date of birthday

I've had the birthday module enabled for a few days. It's set to display birthdays within one day. In addition, I've created a user and a topic area to post a birthday message and added that data to the module. The nearest birthday is mine (today). A day ago it showed that my birthday was in one day. All was going well until this morning, the day of the birthday, when I log in to Joomla and click the Kunena memu where I now only see a blank screen and the following:

ERROR: 0
Call to undefined method KunenaForumCategory::authorise()


I went in to the back-end and disabled the module and the forum worked correctly. Re-enabled it and it failed again.

First check your menu items: www.kunena.org/forum/k5-1-support/151266...u-post-your-question
When the error still exists, contact the author of this extension please.
extensions.schultschik.com/

I thought the Kunena Birthday module was the property of Kunena. Is this not the case? It appeared when I updated Kunena and claims to be "Kunena Birthday Module". Please advise because if it didn't come with Kunena I'll need to find out how it got installed.

No, its created by a kunena member, but the module is not developed by the kunena team.

You can report the issues here: github.com/svanschu/KBirthday