Created attachment 148978 [details] Screenshot SUMMARY *** NOTE: If you are reporting a crash, please try to attach a backtrace with debug symbols. See https://community.kde.org/Guidelines_and_HOWTOs/Debugging/How_to_create_useful_crash_reports *** STEPS TO REPRODUCE 1. Open Discovery 2. Click Preferences 3. Click Software Sources OBSERVED RESULT Prompted to enter my password but got rejected with the following message: Permiso denegado. Es posible que la contraseña no sea correcta. Por favor, pruebe otra vez. En algunos sistemas necesitará pertenecer a un grupo especial (suele ser «wheel») para usar este programa. EXPECTED RESULT Open the Software Sources window. SOFTWARE/OS VERSIONS Linux/KDE Plasma: (available in About System) KDE Plasma Version: 5.24.4 KDE Frameworks Version: 5.92.0 Qt Version: 5.15.3 ADDITIONAL INFORMATION Fresh installation, all packages were updated. No issues when installing/uninstalling/ updating software. The user belongs to the sudo group, able to execute sudo with no issues.
This is a bug in Ubuntu, which provides that app. You'll have to report it to them.
Actually, it looks like it's a KDE bug, but not one in Discover: Bug 452532. *** This bug has been marked as a duplicate of bug 452532 ***