Workforce scheduling - There's no worker available with the specified eligibility criteria for this

Summary:

When attempting to allocate an open shift - get this message:

There's no worker available with the specified eligibility criteria for this time.

This even happened if tried to re-assign to the same employee it was assigned automatically.

Can development team provide the logic for the validation please.

Content (please ensure you mask any confidential information):

Position = Electrical Supervisor - Outer Harbour (TEAM 1), has three employees :

One is automatically included in schedule, other - not.

when do it manually - the error 'There's no worker available …' occurs.

The shift criteria is - the same position employee has: