I am also getting the same error, options : -i -v -- temporary directory: /tmp/flashplugin-nonfree.yVKCTIpaLY importing public key ... selected action = --install installed version = 11.2.202.635 upstream version = 11.2.202.644 wgetoptions= -nd -P . -v --progress=dot:default downloading http://people.debian.org/~bartm/flashplugin-nonfree/D5C0FC14/fp.11.2.202.644.sha512.amd64.pgp.asc ... URL transformed to HTTPS due to an HSTS policy --2016-11-10 08:09:29-- https://people.debian.org/~bartm/flashplugin-nonfree/D5C0FC14/fp.11.2.202.644.sha512.amd64.pgp.asc Resolving people.debian.org (people.debian.org)... 5.153.231.30, 2001:41c8:1000:21::21:30 Connecting to people.debian.org (people.debian.org)|5.153.231.30|:443... connected. HTTP request sent, awaiting response... 404 Not Found 2016-11-10 08:09:29 ERROR 404: Not Found.
cleaning up temporary directory /tmp/flashplugin-nonfree.yVKCTIpaLY ... ERROR: wget failed to download http://people.debian.org/~bartm/flashplugin-nonfree/D5C0FC14/fp.11.2.202.644.sha512.amd64.pgp.asc More information might be available at: http://wiki.debian.org/FlashPlayer