From the support team: “The EXECUTE permission was denied…” error when logging into Microsoft PDK 2013
“The EXECUTE permission was denied…” error when logging into Microsoft PDK 2013 – Dynamics GP Support and Services Blog – Microsoft Dynamics GP – Microsoft Dynamics Community
Microsoft & the GP EcosystemInstall, Upgrade & Admin
Archived post from 2013. Dynamics GP and the links it points to have changed since; check current documentation before relying on version-specific steps.