Remember that the GUI doesn’t always give you the clues you need. When you run things from the command line, you get verbose feedback.
As a side note. As good as YAST is, learning to run a few of the Zipper commands in the terminal window will open a whole new world for you. Zipper is absolutely amazing. It is world class package management. YAST only touches the surface of what it is capable of. Just start with a few simple commands and grow from there. You will never look back.