Created attachment 123518 [details] screenshot STEPS TO REPRODUCE 1. open Discover 2. search for "Arc-ICONS" and click on its "Install" button 3. OBSERVED RESULT it's impossible to cancel the installation because "Cancel" button is greyed out while the icon theme is installed. See the attached screenshot. EXPECTED RESULT installation can be canceled SOFTWARE/OS VERSIONS Operating System: Arch Linux KDE Plasma Version: 5.17.1 KDE Frameworks Version: 5.63.0 Qt Version: 5.13.1
The UI has changed in Discover 5.24.80, but the problem remains: an addon failed to install, and the corresponding task hung with no way to cancel it. I'll file a separate bug for the installation failing.
Related bugs: #450948 and #425265