Use Gwenview quite a bit and generally find it is a great app, but trying to use it tonight, and it locks up every time....
Opensuse x64 Leap42.2, KDE Frameworks 5.26.0., gwenview5-16.08.2-1.1.x86_64
Have tried running from a terminal, uninstalled/reinstalled.
When trying to run, it appears, then disappears, then eventually (45 seconds), appears partly drawn on the screen, but just hangs....
Anyone?
Not sure if it has been updated recently?

After several reboots, it now appears to be "working", but very slowly...
Will see how it goes.

In my case it crashes when I try to resize an image.