whmcs client area links not working

Hi,

Do check http://socialfeedster.com/account/ we have tried to integrate the WHMCS WP integration plugin but every link which is clicked right now generates an error:

Notice: Undefined index: whmcs in /home/badoes/public_html/wp-content/plugins/whmcs-multisite-provisioning/whmcs-mrp.php on line 176
{"error":""}

Please your help