Invisible Icon in Status Bar Without Menu
Hey,
In my status bar there is a invisible icon which I want to remove. If I click on the "icon" there's no menu and I can't figure which program the thing could come from.
I took a screenshot where I click on the icon:
Does someone has an idea how I could remove this "icon"?
I am now on macOS Sierra but it was there before I upgraded too.
MacBook Pro with Retina display, macOS Sierra (10.12)