For the records, I hit the same problem in Debian when trying to use network-manager-fortisslvpn. I opened https://bugs.debian.org/962468 bug report against Debian ppp package and proposed a patch.
** Bug watch added: Debian Bug tracker #962468 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=962468 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/779328 Title: kernel module ppp_generic is missing To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ppp/+bug/779328/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs