When entering employee schedules in onemetrix, there is an error that can appear when a date is selected to add an employee shift to.

This will occur if an employee does not have a pay category assigned
Verify Pay Category
- Still in Onemetrix, navigate to Employees > Employees
- Select the employee that the error occured with
- Assign a pay category in the Primary Pay Category dropdown menu
- Select the save icon when finished.

Now that the employee has a pay category assigned, they will be able to be assigned shift as normal.