There are 4 possible causes of this issue. To action this, see the resolutions below.
Employee has a Date Left entry
Hours will not calculate from this day forward.
Resolution: Confirm with HR team if the Date Left is correct. Remove or update if not.
Employee has a Start Date in advance of the day to be calculated
Resolution: Confirm with the HR team if the Date Started is correct.
Work Pattern assigned for the day(s) has not been configured correctly
Resolution:
Go to CoreTime
Select System Params
Click on Work Patterns
Query the employee's Work Pattern
Click on Standard Hours
Setup the Standard Hours if not present
Click Save
Generate Overtime has not been enabled for the employee
Resolution: Configure the employee to receive hours worked above Basic.