trying to install TDE to stretch

Hi, trying to install TDE to stretch (vm amd64) following this: https://wiki.trinitydesktop.org/Preliminary_Stable_Builds but I get E: Some index files failed to download. They have been ignored, or old ones used instead. [1] apt-get install tde-trinity Reading package lists... Done Building dependency tree Reading state information... Done E: Unable to locate package tde-trinity What should I do to get it done? Thanks [1] Hit:4 http://ftp.at.debian.org/debian testing-updates InRelease Ign:5 http://mirror.xcer.cz/trinity-sb testing/updates Release Ign:6 http://mirror.xcer.cz/trinity-sb testing/updates/deps-r14 amd64 Packages Ign:7 http://mirror.xcer.cz/trinity-sb testing/updates/deps-r14 all Packages Ign:8 http://mirror.xcer.cz/trinity-sb testing/updates/deps-r14 Translation-en_US Ign:9 http://mirror.xcer.cz/trinity-sb testing/updates/deps-r14 Translation-en Ign:10 http://mirror.xcer.cz/trinity-sb testing/updates/deps-r14 amd64 DEP-11 Metadata Ign:11 http://mirror.xcer.cz/trinity-sb testing/updates/deps-r14 DEP-11 64x64 Icons Ign:12 http://mirror.xcer.cz/trinity-sb testing/updates/main-r14 amd64 Packages Ign:13 http://mirror.xcer.cz/trinity-sb testing/updates/main-r14 all Packages Ign:14 http://mirror.xcer.cz/trinity-sb testing/updates/main-r14 Translation-en_US Ign:15 http://mirror.xcer.cz/trinity-sb testing/updates/main-r14 Translation-en Ign:16 http://mirror.xcer.cz/trinity-sb testing/updates/main-r14 amd64 DEP-11 Metadata Ign:17 http://mirror.xcer.cz/trinity-sb testing/updates/main-r14 DEP-11 64x64 Icons Ign:6 http://mirror.xcer.cz/trinity-sb testing/updates/deps-r14 amd64 Packages Ign:7 http://mirror.xcer.cz/trinity-sb testing/updates/deps-r14 all Packages Ign:8 http://mirror.xcer.cz/trinity-sb testing/updates/deps-r14 Translation-en_US Ign:9 http://mirror.xcer.cz/trinity-sb testing/updates/deps-r14 Translation-en Ign:10 http://mirror.xcer.cz/trinity-sb testing/updates/deps-r14 amd64 DEP-11 Metadata Ign:11 http://mirror.xcer.cz/trinity-sb testing/updates/deps-r14 DEP-11 64x64 Icons Ign:12 http://mirror.xcer.cz/trinity-sb testing/updates/main-r14 amd64 Packages Ign:13 http://mirror.xcer.cz/trinity-sb testing/updates/main-r14 all Packages Ign:14 http://mirror.xcer.cz/trinity-sb testing/updates/main-r14 Translation-en_US Ign:15 http://mirror.xcer.cz/trinity-sb testing/updates/main-r14 Translation-en Ign:16 http://mirror.xcer.cz/trinity-sb testing/updates/main-r14 amd64 DEP-11 Metadata Ign:17 http://mirror.xcer.cz/trinity-sb testing/updates/main-r14 DEP-11 64x64 Icons Ign:6 http://mirror.xcer.cz/trinity-sb testing/updates/deps-r14 amd64 Packages Ign:7 http://mirror.xcer.cz/trinity-sb testing/updates/deps-r14 all Packages Ign:8 http://mirror.xcer.cz/trinity-sb testing/updates/deps-r14 Translation-en_US Ign:9 http://mirror.xcer.cz/trinity-sb testing/updates/deps-r14 Translation-en Ign:10 http://mirror.xcer.cz/trinity-sb testing/updates/deps-r14 amd64 DEP-11 Metadata Ign:11 http://mirror.xcer.cz/trinity-sb testing/updates/deps-r14 DEP-11 64x64 Icons Ign:12 http://mirror.xcer.cz/trinity-sb testing/updates/main-r14 amd64 Packages Ign:13 http://mirror.xcer.cz/trinity-sb testing/updates/main-r14 all Packages Ign:14 http://mirror.xcer.cz/trinity-sb testing/updates/main-r14 Translation-en_US Ign:15 http://mirror.xcer.cz/trinity-sb testing/updates/main-r14 Translation-en Ign:16 http://mirror.xcer.cz/trinity-sb testing/updates/main-r14 amd64 DEP-11 Metadata Ign:17 http://mirror.xcer.cz/trinity-sb testing/updates/main-r14 DEP-11 64x64 Icons Ign:6 http://mirror.xcer.cz/trinity-sb testing/updates/deps-r14 amd64 Packages Ign:7 http://mirror.xcer.cz/trinity-sb testing/updates/deps-r14 all Packages Ign:8 http://mirror.xcer.cz/trinity-sb testing/updates/deps-r14 Translation-en_US Ign:9 http://mirror.xcer.cz/trinity-sb testing/updates/deps-r14 Translation-en Ign:10 http://mirror.xcer.cz/trinity-sb testing/updates/deps-r14 amd64 DEP-11 Metadata Ign:11 http://mirror.xcer.cz/trinity-sb testing/updates/deps-r14 DEP-11 64x64 Icons Ign:12 http://mirror.xcer.cz/trinity-sb testing/updates/main-r14 amd64 Packages Ign:13 http://mirror.xcer.cz/trinity-sb testing/updates/main-r14 all Packages Ign:14 http://mirror.xcer.cz/trinity-sb testing/updates/main-r14 Translation-en_US Ign:15 http://mirror.xcer.cz/trinity-sb testing/updates/main-r14 Translation-en Ign:16 http://mirror.xcer.cz/trinity-sb testing/updates/main-r14 amd64 DEP-11 Metadata Ign:17 http://mirror.xcer.cz/trinity-sb testing/updates/main-r14 DEP-11 64x64 Icons Ign:6 http://mirror.xcer.cz/trinity-sb testing/updates/deps-r14 amd64 Packages Ign:7 http://mirror.xcer.cz/trinity-sb testing/updates/deps-r14 all Packages Ign:8 http://mirror.xcer.cz/trinity-sb testing/updates/deps-r14 Translation-en_US Ign:9 http://mirror.xcer.cz/trinity-sb testing/updates/deps-r14 Translation-en Ign:10 http://mirror.xcer.cz/trinity-sb testing/updates/deps-r14 amd64 DEP-11 Metadata Ign:11 http://mirror.xcer.cz/trinity-sb testing/updates/deps-r14 DEP-11 64x64 Icons Ign:12 http://mirror.xcer.cz/trinity-sb testing/updates/main-r14 amd64 Packages Ign:13 http://mirror.xcer.cz/trinity-sb testing/updates/main-r14 all Packages Ign:14 http://mirror.xcer.cz/trinity-sb testing/updates/main-r14 Translation-en_US Ign:15 http://mirror.xcer.cz/trinity-sb testing/updates/main-r14 Translation-en Ign:16 http://mirror.xcer.cz/trinity-sb testing/updates/main-r14 amd64 DEP-11 Metadata Ign:17 http://mirror.xcer.cz/trinity-sb testing/updates/main-r14 DEP-11 64x64 Icons Err:6 http://mirror.xcer.cz/trinity-sb testing/updates/deps-r14 amd64 Packages 404 Not Found Ign:7 http://mirror.xcer.cz/trinity-sb testing/updates/deps-r14 all Packages Ign:8 http://mirror.xcer.cz/trinity-sb testing/updates/deps-r14 Translation-en_US Ign:9 http://mirror.xcer.cz/trinity-sb testing/updates/deps-r14 Translation-en Ign:10 http://mirror.xcer.cz/trinity-sb testing/updates/deps-r14 amd64 DEP-11 Metadata Ign:11 http://mirror.xcer.cz/trinity-sb testing/updates/deps-r14 DEP-11 64x64 Icons Ign:12 http://mirror.xcer.cz/trinity-sb testing/updates/main-r14 amd64 Packages Ign:13 http://mirror.xcer.cz/trinity-sb testing/updates/main-r14 all Packages Ign:14 http://mirror.xcer.cz/trinity-sb testing/updates/main-r14 Translation-en_US Ign:15 http://mirror.xcer.cz/trinity-sb testing/updates/main-r14 Translation-en Ign:16 http://mirror.xcer.cz/trinity-sb testing/updates/main-r14 amd64 DEP-11 Metadata Reading package lists... Done W: The repository 'http://mirror.xcer.cz/trinity-sb testing/updates Release' does not have a Release file. N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use. N: See apt-secure(8) manpage for repository creation and user configuration details. E: Failed to fetch http://mirror.xcer.cz/trinity-sb/dists/testing/updates/deps-r14/binary-amd6… 404 Not Found E: Some index files failed to download. They have been ignored, or old ones used instead.