[otrs] Agent Notifications Still Appears after Upgrade to OTRS 5

I recently completed a test upgrade from 4.0.24. -> 5.0.22. Following the upgrade, the Agent Notifications menu still appears in the Agent Dashboard. Ticket Notifications is also listed and Agent Notifications from version 4 were successfully migrated. When I attempt to open Agent Notifications in version 5 it throws this error: Module Kernel/Modules/AdminNotification.pm not in @INC (/opt/otrs/Custom /opt/otrs/Kernel/cpan-lib /opt/otrs/ /usr/local/lib64/perl5 /usr/local/share/perl5 /usr/lib64/perl5/vendor_perl /usr/share/perl5/vendor_perl /usr/lib64/perl5 /usr/share/perl5 . /etc/httpd) Any insights appreciated. Thanks, +Eric