When a component is added to a Workflow project, the requisite DLL is added to the project.
In this case, there is an additional DLL that needs to be manually added (Symantec.ServiceDesk.Legacy.Core.dll).
Error validating info - Result on component SD.Components.ServiceCalls.GetUserDetailsComponent
Could not find data handler for type SD.DataTypesCore.Data.Common.UserDetailsResult
Library dependency on 'Symantec.ServiceDesk.Legacy.Core' is not handled automatically.
Manually add the 'Symantec.ServiceDesk.Legacy.Core.dll' library to the project.