How to use the disabledMinutes option of TUI timepicker?

I have implemented the Toast UI timepicker from here on my website. I’m trying to use the disabledMinutes option to disable a specific time such as “03:15” but it is not working. I could still select 03:15 on my timepicker. What could be the issue?

Here is what I have so far

var tui = new tui.TimePicker('#test', {
        initialHour: 12, 
        initialMinute: 0,   
        inputType: 'spinbox',
        format: 'hh:mm', 
        disabledMinutes: {
            3 : [true, true, true, true, true, true, true, true, true, true, 
                 true, true, true, true, false, true, true, true, true, true, 
                 true, true, true, true, true, true, true, true, true, true, 
                 true, true, true, true, true, true, true, true, true, true, 
                 true, true, true, true, true, true, true, true, true, true, 
                 true, true, true, true, true, true, true, true, true, true]
        }
    });