Comment 2 for bug 1571432

Thank you for taking the time to report this bug and helping to make
Ubuntu better. Please execute the following command only once, as it
will automatically gather debugging information, in a terminal:
apport-collect 1571432

When reporting bugs in the future please use apport by using
'ubuntu-bug' and the name of the package affected. You can learn more
about this functionality at https://wiki.ubuntu.com/ReportingBugs.

Additionally, could you please provide the content (but remove/obscure
the password) of your /etc/cacti/debian.php

I have a hunch that either you upgraded cacti, but not the configuration
(the driver needs to be switched from mysql to mysqli) or that there is
something specific in the install script, because the rest of cacti is
confirmed to work with php7 provided you use the mysqli driver. In
Debian/Ubuntu, no other changes were needed to switch to php7.

Paul