导出带有错误代码的.csv文件，里面写着“试图获取非对象的属性”

I used this code to export the report into excel (.csv) But in the exported file right bellow the datas it shows some error saying error line 1026.
This is line 1026

$event_group_members = \App\EventGroupMembers::where('eg_id', '=',$event_group->eg_id)->get();
if ($event_group_members->count() > 0) {
    foreach ($event_group_members as $event_group_member) {
        $member = \App\User::find($event_group_member->user_id);
        if ($member) {
            $booking_status = \EUser::getEUserBookingStatusPayment($event_group_member->user_id, $booking_data->booking_id);
            $ar_data = array($chalet_name, $chalet_unit, $event_group->name, $booking_status, $member->first_name .' '. $member->last_name, $member->email, $member->phone);
            if ($addons->count() > 0){
                $addons_booked = \App\EventBookingCharges::where('charge_key', '=', 'add-ons')->where('user_id', '=', $event_group_member->user_id)->where('booking_id', '=', $booking_data->booking_id)->get();
                foreach ($addons as $addon){
                    if ($addons_booked->count() > 0) {
                        foreach ($addons_booked as $addon_booked){
                            $decoded = json_decode($addon_booked->json);
                            if ($decoded->addon_id == $addon->addon_id) {
                                array_push($ar_data, "yes");
                            } else {
                                array_push($ar_data, "no");
                            }
                        }
                    } else {
                        array_push($ar_data, "no");
                    }
                }
            }
            fputcsv($file, $ar_data);
        }
    }
}

I cant find whats wrong
I really hope you guys can help me with this

Make sure you have the $event_group to locate your eg_id.

This is error you will get generally if you are accessing a relation model column where the related records doesn't exists. Its better to check relation available and proceed.