kwallet support missing
The gajim version in Debian buster can currently not be used anymore with the kwallet. This basically breaks the client for me. The commit 13a61d76 ("Remove support for GNOME Keyring and KWalletCLI, instead always use libsecret.") did that and now claims that libsecret support would be available in kde. This is wrong - even the ksecretservice project isn't usable (it is dead since ages and its pages are pending for deletion).
Please fix that by re-adding the kwalletcli/kwallet-query/kwallet-dbus support. The downstream bug is https://bugs.debian.org/888605