Hi,
Please edit the file "administrator/components/com_hikashop/classes/field.php" and replace
$namekey = hikashop_secureField($field->field_namekey);
if(empty($order_status)){
if($table=='item') $table ='order_product';
By
if($table == 'contact')
return;
$namekey = hikashop_secureField($field->field_namekey);
if(empty($order_status)){
if($table=='item') $table ='order_product';
It will fix the display of the chart when looking at a contact custom field.
The next HikaShop release will contain the fix and other fixes for the contact custom fields.
Regards,