Can´t hide posts?

Hi guys,

I hope you can help me out. :) I created my first UNA page and really love the easy way to work with it. But I have a little problem. I registered a new user, to check if everything works fine, and after updating my profile picture and profile cover, this action was posted to tha home screen. So I decided to hide these two posts with the context menu. Unfortunately, I can´t hide it. The processing animation (running circle) appears forever and nothing happens. Any idea what´s going wrong? I have admin rights, so it should be possible. :)

I have the same problem when I want to create a new post inside a group. When I add a new discussion or post from the ADD NEW CONTENT menu of the user and choose the groups as "who can see this post", it works. Otherwise the spinning circle.

I added two screenshots of what´s going on. 

I hope you can give me a hand here.

Thanks a lot and merry christmas.

Christian aka Kathraal