when I install a .deb package the following message appears: "unable to install from an unsigned repository" it started when it upgraded to plasma 5.20 Operating System: KDE neon 5.20 KDE Plasma Version: 5.20.3 KDE Frameworks Version: 5.75.0 Qt Version: 5.15.1 Kernel Version: 5.4.0-54-generic OS Type: 64-bit Processors: 6 × AMD FX(tm)-6300 Six-Core Processor Memory: 7.8 GiB of RAM Graphics Processor: Radeon RX550/550 Series
*** This bug has been marked as a duplicate of bug 428125 ***