Comment # 4 on bug 1226526 from Peter Krause

(In reply to Christophe Marin from comment #3)
> (In reply to Peter Krause from comment #2)
> > (In reply to Christophe Marin from comment #1)
> > > > /usr/bin/plasmashell: undefined symbol: _ZN11PlasmaQuick15AppletQuickItem8t
> > > 
> > > is a sign some packages come from different repositories.
> > > 
> > > What's the output of `rpm -qi plasma6-workspace libPlasma6` ?
> > 
> 
> > Name        : plasma6-workspace
> > Version     : 6.0.5
> > Vendor      : openSUSE
> 
> 
> > Name        : libPlasma6
> > Version     : 6.1.0
> > Source RPM  : libplasma6-6.1.0-kf.15.1.src.rpm
> > Vendor      : obs://build.opensuse.org/KDE
> 
> Here's your issue, you're mixing packages from openSUSE:Factory and
> KDE:Frameworks.

Thanks a lot for your support! Does this happen when running updates via both
commandline using zypper and Discover?
So now, uninstall libPlasma6 and install using zypper?