In order to upgrade Trinity Desktop from R14.0.6 to R14.0.10, I have attempted to follow the instructions on https://wiki.trinitydesktop.org/Ubuntu_Trinity_Repository_Installation_Inst… However, I get this error in synaptic: The repository 'http://mirror.ppa.trinitydesktop.org/trinity/deb/trinity-r14.0.x ubuntu Release' does not have a Release file.Updating from such a repository can't be done securely, and is therefore disabled by default.See apt-secure(8) manpage for repository creation and user configuration details.The repository 'http://mirror.ppa.trinitydesktop.org/trinity/deb/trinity-builddeps-r14.0.x ubuntu Release' does not have a Release file. I have tried adding the list in /etc/apt/sources.list and have switched to /etc/apt/sources.list.d/trinity-ubuntu-bionic.list which results in the same error. The lines, as inserted, read: deb http://mirror.ppa.trinitydesktop.org/trinity/deb/trinity-r14.0.x ubuntu main deb http://mirror.ppa.trinitydesktop.org/trinity/deb/trinity-builddeps-r14.0.x ubuntu main I have also tried to replace .x with .10 with the same results. I did "Import GPG signing key" Any ideas? Sincerely, Daniel.