My olimex freedombox is behind a telekom router an about two month old.
Today I tried to install matrix, but it fails with:
"Fehler beim Installieren der Anwendung: Error during installation E: Repository ‘tor+http://cdn-fastly.deb.debian.org/debian buster InRelease’ changed its ‘Suite’ value from ‘testing’ to ‘stable’ E: Repository ‘tor+http://cdn-fastly.deb.debian.org/debian buster-updates InRelease’ changed its ‘Suite’ value from ‘testing-updates’ to ‘stable-updates’ E: Repository ‘tor+http://security-cdn.debian.org/debian-security buster/updates InRelease’ changed its ‘Suite’ value from ‘testing’ to ‘stable’ "