I'm trying to upgrade from v15.5.1694.0 to v15.5.3849.1 and the upgrade fails. Log shows multiple archives that are trying to be downloaded with 404 not found errors. I've manually browsed to the addresses of these archives, and the paths don't even exist! Get:1 http://httpredir.debian.org/debian/ jessie/main libpcap0.8 amd64 1.6.2-2 [133 kB] Get:2 http://downloads.3cx.com/downloads/3cxpbx/ 3cxpbx 15.5.3849.1 [80.6 MB] Err http://httpredir.debian.org/debian/ jessie/main tcpdump amd64 4.6.2-5+deb8u1 404 Not Found [IP: 220.127.116.11 80] Fetched 80.7 MB in 1min 51s (723 kB/s) E: Failed to fetch http://httpredir.debian.org/debian/pool/main/t/tcpdump/tcpdump_4.6.2-5+deb8u1_amd64.deb 404 Not Found [IP: 18.104.22.168 80] E: Unable to fetch some archives What can be done to fix these paths and get this upgrade installed? Full log attached.