Using mcabber, I wasn’t able to save a room (muc) in my roster. I did get the following message in my /var/log/metronome/metronome.log :
Unable to write to private storage (’/var/lib/metronome/domain%2etld/private/user.dat~: No such file or directory’) for user: user@domain.tld
So I had to create the directory :
sudo mkdir /var/lib/metronome/domain%2etld/private
and change the owner to metronome:
sudo chown metronome.metronome /var/lib/metronome/domain%2etld/private
Now it works like charm, I hope it can be usefull to someone else