THE log btw doesn't help much more:
2017-08-22 20:02:20 <1> m402TW-DarkStar(14926) [Ruby] bin/y2start:16
y2base called with ["sw_single", "qt", "-name", "YaST2", "-icon", "yast"]
2017-08-22 20:02:20 <1> m402TW-DarkStar(14926) [ui-component]
YUIComponentCreator.cc(createInternal):124 Creating UI component for ""
2017-08-22 20:02:20 <1> m402TW-DarkStar(14926) [ui]
YSettings.cc(setProgDir):61 Set progDir to "/usr/share/YaST2"
2017-08-22 20:02:20 <1> m402TW-DarkStar(14926) [ui]
YSettings.cc(setProgDir):62 progDir is now locked.
2017-08-22 20:02:20 <1> m402TW-DarkStar(14926) [ui]
YSettings.cc(setLocaleDir):147 Set localeDir to "/usr/share/YaST2/locale"
2017-08-22 20:02:20 <1> m402TW-DarkStar(14926) [ui]
YSettings.cc(setLocaleDir):148 localeDir is now locked.
2017-08-22 20:02:20 <1> m402TW-DarkStar(14926) [ui] YPath.cc(YPath):49
Given filename: libyui-qt.so.8
2017-08-22 20:02:20 <1> m402TW-DarkStar(14926) [ui]
YSettings.cc(progDir):74 progDir: "/usr/share/YaST2"
2017-08-22 20:02:20 <1> m402TW-DarkStar(14926) [ui] YPath.cc(YPath):65
Preferring subdir: /usr/share/YaST2
2017-08-22 20:02:20 <1> m402TW-DarkStar(14926) [ui] YPath.cc(YPath):66
Subdir given with filename:
2017-08-22 20:02:20 <1> m402TW-DarkStar(14926) [ui] YPath.cc(YPath):67
Looking for: libyui-qt.so.8
2017-08-22 20:02:20 <1> m402TW-DarkStar(14926) [ui] YPath.cc(lsDir):138
Looking in /usr/lib64/yui
2017-08-22 20:02:20 <1> m402TW-DarkStar(14926) [ui] YPath.cc(YPath):121
Could NOT find libyui-qt.so.8 by looking recursive inside /usr/lib64/yui
2017-08-22 20:02:20 <3> m402TW-DarkStar(14926) [ui]
YUIPlugin.cc(YUIPlugin):50 Could not load UI plugin "qt":
libyui-qt.so.8: cannot open shared object file: No such file or directory
2017-08-22 20:02:20 <2> m402TW-DarkStar(14926) [ui]
YUILoader.cc(loadPlugin):195 THROW: Couldn't load plug-in qt