Fedora 22/Gnome 3.16: SkypeNotification was not visible anymore

I use the SkypeNotification for the Gnome Shell from https://github.com/chrisss404/gnome-shell-ext-SkypeNotification.

After starting skype, an Icon appears and notifies on some changes on chats.

This one I had to update to the last version from the git-Repo and after applying the update
to <homedir>/.local/share/gnome-shell/extensions and restarting the gnome-shell with
<alt>-<F2> and the command 'r', the icon appeared again.