I am getting below error while using fullcalender on my website...

**"TypeError: t.start is undefined"**, in fullcalendar.min.js while using on my website for google calender functionality

```
TypeError: t.start is undefined    
... == t.allDay && (t.allDay = !(t.start.hasTime() || t.end && t.end.hasTime())), t...      
fullcal....min.js (line 713, col 44)

```

My fullcalender JS code is

```
$('#calendar').fullCalendar({
            header: {
                left: 'prev,next,today',
                center: 'title',
                right: 'month,basicWeek,basicDay'
            },
            googleCalendarApiKey: 'AIzaSyA6Cw8V_MPSGbqZTa66CW0yVCkuG8lE2Uo',
            events: [
                {
                    googleCalendarId: 'ashish.raj189@gmail.com'
                },
            ],
        });
    });

```

Could you tell me what should do for fix the **TypeError**?

I am using gcal.html library file of fullcalendar-2.3.1, downloaded from <http://fullcalendar.io/download/>

I have included moment.min.js, jquery.min.js, fullcalendar.min.js, gcal.js

In my website header I have used some other js libraries also... but how to resolve the issue if this coming because of any other library... please help me friends...