Manually removing the /usr/share/help/si/ubuntu-help/accounts-disable-service.page symlink appears to fix the problem. Once I did so, I was able to re-run "apt-get upgrade" with no errors.
Manually removing the /usr/share/ help/si/ ubuntu- help/accounts- disable- service. page symlink appears to fix the problem. Once I did so, I was able to re-run "apt-get upgrade" with no errors.