I understand that the original version of Adobe's Flash is deprecated for security reasons, and that we should use Pepper Flash instead.
However, I cannot install Pepper Flash on Ubuntu 16.04. (I use Chromium, not Firefox.)
I have followed the instructions to add the repository
ppa:skunk/pepper-flash, which worked, and continues to work, perfectly on 14.04.
But, on 16.04, when I reload the repositories, I get this error:
E: The repository 'http://ppa.launchpad.net/skunk/pepper-flash/ubuntu xenial Release' does not have a Release file. N: Updating from such a repository can't be done securely, and is therefore disabled by default. N: See apt-secure(8) manpage for repository creation and user configuration details.
Is this something that I have done incorrectly? How can I fix this?