Errors After Upgrading

Hi,

I upgraded to 2.3 following onscreen instructions from the component in the backend. I did the manual upgrade.

All seems ok, however, I am now getting these email, but cannot find an error.

Quote

An error has occurred in nBill (front end)! Details of the error are given below:

User ID: 62
Billing Version:
Service Pack:
Domain: https://www.xxx.com
Date/Time: 02-Jan-2012 04:01:52 pm
IP Address: xxx.xxx.xxx.xxx
Page: https://www.xxx.com/index.php?option=com_nbill&action=orders&task=order&cid=4&Itemid=101
Referrer: http://www.xxx.com/index.php?option=com_nbill&action=orders&task=order&cid=4&Itemid=101
Error Log ID: 6
Error Message: Missing argument 2 for nbf_common::get_param(), called in /home/xxx/public_html/administrator/components/com_nbill/framework/classes/nbill.payment.class.php on line 0 and defined
File Name: /home/xxx/public_html/administrator/components/com_nbill/framework/classes/nbill.common.class.php
Line Number: 89
PHP Version (and OS): 5.2.17 (Linux)
CMS: Joomla!
CMS Version: 1.5.x

Any idea?

Thanks!!

Red