Service Mapping: "Error on server request getServiceTreeData. Unknown error." occurs when viewing a Business Service map

Overview

The error "Error on server request getServiceTreeData. Unknown error." occurs when viewing a Business Service map.

Root Cause

The "All" group is missing from cmdb_ci_service_group. The "All" service group is a default group added by Service Mapping. This group is required in order for the service tree to appear on the map because it is by default the root of all groups.

Solution

Restore the missing cmdb_ci_service_group record.