The “Add” button does not allow you to click after entering the date, number and type of hours (button remains inactive and greyed out)
The Add button will not become active and allow editing and saving of hours until the following occurs:
A date or multiple dates are selected
The Hours Type is selected (Default option is Instruction)
The number of hours is entered (can be zero) and the cursor has been exited from the number of hours box. Until you hit Enter, or Tab, or click out of the number of hours box, the database will not activate the Add button, as it does not realize that you have completed that step.