Version 2.1.5+dfsg1-1 of kopano-webapp-plugin-files is marked for autoremoval from testing on Tue 06 Aug 2019. It depends (transitively) on php-gettext, affected by #851771. You should try to prevent the removal by fixing these RC bugs.
Last update: 2019-07-22
Depends on packages which need a new maintainer
The packages that kopano-webapp-plugin-files depends on which need a new maintainer are: