GP Support tackles An unexpected error has occurred. Please contact your system Administrator Doesn’t this mean that there are also “expected” errors? That seems…interesting.
An unexpected error has occurred. Please contact your system Administrator – Microsoft Dynamics GP Community
Install, Upgrade & AdminMicrosoft & the GP Ecosystem
Archived post from 2014. Dynamics GP and the links it points to have changed since; check current documentation before relying on version-specific steps.