Terry Heley explains that Microsoft Dynamics GP 2013 Service Pack 2 does not seem to play NICE with Business Portal Human Resource Self Service Suite 6.0
Microsoft Dynamics GP 2013 Service Pack 2 does not seem to play NICE with Business Portal Human Resource Self Service Suite 6.0 – Dynamics GP Support and Services Blog – Microsoft Dynamics GP – Microsoft Dynamics Community
Microsoft & the GP EcosystemInstall, Upgrade & AdminGP 2013
Archived post from 2013. Dynamics GP and the links it points to have changed since; check current documentation before relying on version-specific steps.