When making a Group Event and enabling discussion, there is no option or entry on Sidebar to make a discussion. Disabling and enabling has no effect. (hidden information video)
Hi there Jean-Marc Burri,
It seems that you haven't enabled "Disscussion" apps at Backend>Components>EasySocial>Applications as shown http://screencast.com/t/YtGX8pJhiLHy. I have enabled it for you and it should works fine now and in order for them to be access on applications menu, this "Discuss" for event should be enabled.
By the way, You are most welcome. Glad to hear that your issue has been resolved now.
As a gentle reminder, kindly start a new thread if you have any other issue in the future so it will be easier for us to manage your inquiry. I will lock and mark this thread as resolved.