If no hourly paid employees are accruing holidays, you will need to make sure that the system setting Leave Accrual: Use Weekly Accrual for Hourly Paid Staff is set to true.
You can find this setting by following the below steps:
Click on Settings via the Configuration or Admin menu.
This depends on how your system is configured.
Click System Settings.
Click on Holidays and Leave Accruals on the left-hand menu.
You will need to scroll down until you get to the section Salary Type Accrual Options.
Set Leave Accrual: Use Weekly Accrual for Hourly Paid Staff to True.