Created attachment 125366 [details] Screenshot SUMMARY I believe "/usr/share/applications/org.kde.okular.kirigami.desktop" is to blame, but on my Arch linux system, okular produces an entry in KDE's "Lost and Found" catagory. I would think this plugin shouldn't show up in the menu at all? I'm running plasma 5.17.5, and Okular from Applications 19.12.1.
This might not be a plugin, but the Okular mobile application. I suggest to start it to verify.