Comment 5 for bug 1628247

pepperflashplugin-nonfree now downloads the Flash Player Plugin from Adobe instead of Google, starting with version 1.8.2+nmu1ubuntu1.1 in yakkety-proposed (and 1.8.3+nmu1ubuntu1 in zesty). So this issue can no longer happen. Marking it as Fix Released.

Avoid using this package anyway unless on Debian, use adobe-flashplugin on Ubuntu instead: https://help.ubuntu.com/17.04/ubuntu-help/net-install-flash.html