Calendar plugin will not show events unless we an array

return CourseInstanceSchedule::with('courseInstance')
        ->whereBetween('start_date', [$fetchInfo['start'], $fetchInfo['end']])
        ->get()
        ->map(function($schedule){
            return EventData::make()
                ->id($schedule->id)
                ->title($schedule->courseInstance->course->name)
                ->start(
                    $this->getDateAndTime($schedule->start_date, $schedule->start_time),            
                )
                ->end(
                    $this->getDateAndTime($schedule->start_date, $schedule->end_time)
                )                
                ->backgroundColor('red')
                ->borderColor('red')
                ->textColor('white')
                ->toArray();
        })->all();

return CourseInstanceSchedule::with('courseInstance')
        ->whereBetween('start_date', [$fetchInfo['start'], $fetchInfo['end']])
        ->get()
        ->map(function($schedule){
            return EventData::make()
                ->id($schedule->id)
                ->title($schedule->courseInstance->course->name)
                ->start(
                    $this->getDateAndTime($schedule->start_date, $schedule->start_time),            
                )
                ->end(
                    $this->getDateAndTime($schedule->start_date, $schedule->end_time)
                )                
                ->backgroundColor('red')
                ->borderColor('red')
                ->textColor('white')
                ->toArray();
        })->all();