TypeError: undefined is not an object (evaluating 'datesList[_this.state.numVisibleDays - 1].date')

HI, i've added a calendar strip instance like this:

` {
return (date.isoWeekday() === 6 || date.isoWeekday() === 7);
}}
/>`

But i'm getting an error:
TypeError: undefined is not an object (evaluating 'datesList[_this.state.numVisibleDays - 1].date')

If i remove the "datesBlacklist" property, it works but i need to disable saturdays and sundays.

I'm using version => "react-native-calendar-strip": "^2.2.3"

Thanks in advance.