CentOS 7: Login no longer possible after update to guam-0.9.8

Download guam-0.9.5-4.3.el7.kolab_16.x86_64.rpm & erlang-eimap-0.4.0-10.3.el7.kolab_16.x86_64.rpm

systemctl stop guam

cp /etc/guam/sys.config /etc/guam/sys.config.save

rpm --nodeps -ehv guam-0.9.8-1.3.el7.kolab_16.x86_64
rpm --nodeps -ehv erlang-eimap-0.4.3-1.2.el7.kolab_16.x86_64
rpm --nodeps -Uhv guam-0.9.5-4.3.el7.kolab_16.x86_64.rpm
rpm --nodeps -Uhv erlang-eimap-0.4.0-10.3.el7.kolab_16.x86_64.rpm

cp /etc/guam/sys.config.save /etc/guam/sys.config

systemctl enable guam

systemctl start guam