Created attachment 109643 [details] Shoot of the dialog saying it could not delete Removing icon themes from SystemSettings > Icons using the "Remove Theme" button will always result in a popup saying it could not delete them. There are no visible crashes or errors but this. I can delete them manually without a problem. This happens no matter how you installed them manually to ~/local/share/icons or using "Get New Themes". openSuse tumbleweed + KDE unstable repos.
confirmed using neon-devedition-unstable the theme ist only removed fron the list in the systemsettings module, but the files are still in .local/share/icons and also marked as installed in the "Get New Themes" dialog
Git commit 08c0a73303dc0cc6f694a218f99b2d91cff24208 by Kai Uwe Broulik. Committed on 08/01/2018 at 09:34. Pushed by broulik into branch 'master'. [Icons KCM] Construct QUrl from local file CHANGELOG: Fixed bug that prevented icon themes from being uninstalled FIXED-IN: 5.12.0 Differential Revision: https://phabricator.kde.org/D9651 M +1 -1 kcms/icons/iconthemes.cpp https://commits.kde.org/plasma-desktop/08c0a73303dc0cc6f694a218f99b2d91cff24208
On Arch Linux, "Remove theme" button is not enabled when I select a theme to remove it.
Please file a separate bug report for this. However, you cannot remove system-wide installed (/usr) themes, only ones in your user folder downloaded through e.g. get hot new stuff