Starting any Qt-based programs fails. Some with the error below:
kmail: relocation error: /lib/x86_64-linux-gnu/libQt5Quick.so.5: symbol _ZNK11QTextCursor12hasSelectionEv version Qt_5 not defined in file libQt5Gui.so.5 with link time reference
Others with this:
KCrash: crashing... crashRecursionCounter = 2
KCrash: Application Name = kate path = /usr/bin pid = 12446
KCrash: Arguments: /usr/bin/kate
KCrash: Attempting to start /usr/lib/x86_64-linux-gnu/libexec/drkonqi from kdeinit
Unable to start Dr. Konqi
Re-raising signal for core dump handling.
Segmentation fault (core dumped)
Firefox started fine so I was able to send this thru my Nextcloud instance. And I am in the favourable situation, that I have a spare pc somewhere :)
Any idea how to resolve this without reinstalling? I would hate having to spend days to set it up again after I reinstalled a few weeks ago.