I use debian 7 64 bits.
I use addons: clamav, monitorix, opendkim and mailgraph
Before update, update addons: monitorix, opendkim and mailgraph
running update to 1.2.0
the Problem: the addons Monitorix work for the port 8080, 8080 is use for ngix.
Solve:
change port monitorix /etc/monitorix/monitorix.conf 8080 to 8085
and running update.