Watchkit AppIcon – The app icon set named “AppIcon” did not have any applicable content

This is an easy method to generate your WatchKit icons, which worked well for me:

• Upload a source image to http://makeappicon.com
• Go to Images.xcassets in the WatchKit app
• Right click on the pane which includes AppIcon, select “Import…”, and choose the watchkit folder that makeappicon.com generated for you