TL;DR - when I drag a Group onto the Watch in storyboard, it vanishes, nothing shows, no sign. Huh?
Newbie on Xcode11 and WatchOS6. I created a new Watch App, went down to the WatchKit App, clicked on the Interface.storyboard, then tried to add a Group onto the watch (which says "Hosting Controller"). (I'm following around with a youtube swift tutorial). I can click +, find Group, but when I drag and release onto the Watch, it simply vanishes - nothing else seems to happen.
I'm unsure why it's not adding it, and not sure where to go from here.

