After upgrade to 14.0.6, kcontrol doesn't allow Administrator Mode

Hi, I've upgraded my OpenSuSE Leap 15 to Trinity 14.0.6, but now I can't use Administrator Mode to e.g. change the Login Manager settings. As a regular user I can start the Trinity Control Center and navigate to System Administration -> Login Manager, but when I click on Administrator Mode I get a tdesu window to fill in the root password, but after filling in the root password it is non-responsive. (See attachment 1.) The problem appears to be with tdesu, because when I kill that, the Control Center window is unlocked again. If I start a root konsole session and enter kcontrol & the Trinity Control Center starts, but has only two components visible (see attachment 2). I also see the following messages in the root konsole window: | █ [tdebuildsycoca] tdebuildsycoca running... | [tdebuildsycoca] Reusing existing tdesycoca. | kcontrol: WARNING: No TDE menu group with X-TDE-BaseGroup=settings found ! Defaulting to Settings/ What do I need to change to get the Control Center working properly? What other information will help diagnose this? Leslie