Job Code is missing in the Configure Object Definition.
Reproducing the Issue
> Configure Object Definition
> Search JobCode or Job Code
jobCode / Job Code is the technical appellation/ label for Job Classification (foundation objects)
The standard delivered nomemclature is Job Classification and not Job Code
To find Job Code (JobCode) please go to Manage Data > Job Classification (standard name for Job Code)
If you do not have it there, that would be because you have not created any yet.
To create these go to Configure Object Definition > Job Classification .
Job Code Job Classification , KBA , LOD-SF-EC-EMP , Employment Information , LOD-SF-EC , Employee Central , Problem