Package: ftp.debian.org Severity: normal MZLA Technologies Corporation did change the interface for AddOns again by the release of Thunderbird 78.0 (introduced into unstable on 2020-09-27 by version 1:78.3.1-1) after that already happen by the start of the 68.x ESR circle.
Since the first version of Thunderbird 78.x now newer version of sogo-connector was getting released. This results in a non compatible old sogo-connector package that isn't usable for users. This was now reported by a user in #989657. It's completely unclear if upstream will release a newer version soon, I don't expect so. Please remove sogo-connector from the archive. Regards Carsten