There is the Images.xcassets file in my WatchKit App. As soon as I put any icon in that asset build failed with the error message: \"The app icon set named \"AppIcon\" d
Lets write it down into lazy mode easy version, all other answers were confusing me the hell out. i hope following help others.
so from AppIcon > on row1, col1 on 2x > i drag and dropped, the following invalid image:
Which had actual size as below:
i found that for 2x the image size should be 40px by 40px so i modified that image into 40px by 40px from that invalid value.
This time the build/compile worked and in my iPhone 7 i have the new icon.