Why does my WatchKit extension cause a “Waiting to attach” message on an actual Apple Watch but not in a simulator?

Question

I have a published iOS app and am trying to add a WatchKit extension for it.

For now, all I have is a watch interface.storyboard with a si

Answer 1

It was really never working for me.

I was able to fix it to remove any specific architectures in the build settings of the app target and leave it to Automatic (remove ARCHS = ... in project file)