Error getting default calendar for new events: Error Domain=EKCADErrorDomain Code=1013 "The operation couldn’t be completed

Question

i am using a simple code to store calendar events programmatically i had search for many solutions on stack but all are mentioned in SWIFT stack-1 stack -2 and i am using Object-C here is the code that i use:

NSDateFormatter *dateFormatter = [[NSDateFormatter alloc]init];
[dateFormatter setDateFormat:@"MM/dd/yyyy"];

EKEventStore *store = [EKEventStore new];

[store requestAccessToEntityType:EKEntityMaskEvent completion:^(BOOL granted, NSError *error) {
    NSLog(@"%@",error);

    if (!granted) { return; }
    EKEvent *event = [EKEvent eventWithEventStore:store];
    event.title = @"Restaurant Table";
    event.startDate = [NSDate date];

    // event.endDate = [event.startDate dateByAddingTimeInterval:60*60];  //set 1 hour meeting
    event.calendar = [store defaultCalendarForNewEvents];
    NSError *err = nil;
    [store saveEvent:event span:EKSpanThisEvent commit:YES error:&err];
    // self.savedEventId = event.eventIdentifier;  //save the event id if you want to access this later
}];

Thanks in advance and for source code here its Programmatically add custom event in the iPhone Calendar