09-21-2019, 03:10 AM
Fix all the Key's Expired (Horst3180, Tor, trojita) with this guide - https://linux-audit.com/how-to-solve-an-...-with-apt/
Replace with the new Key appropriate to that PPA. Visit their PPA and ask for the new Key. Then try Updates again.
Replace with the new Key appropriate to that PPA. Visit their PPA and ask for the new Key. Then try Updates again.