I found this after the latest upgrade of KDE related packages, korganizer in my case.
$ korganizer
korganizer: error while loading shared libraries: libKF5TextAutoCorrection.so.1: cannot open shared object file: No such file or directory
There should be respins available, see https://bugs.kde.org/show_bug.cgi?id=469599.
Sorry, I didn't look carefully enough, this is a duplicate of https://forum.artixlinux.org/index.php/topic,5440.0.html.
kmail and korganizer work now. I believe this is solved.
Yes, all seems OK again. Thanks for the update.