Monir

Hello, I just installed whmcs to my reseller hosting account. When i am trying to add a product through my whmcs admin (http://dolphinwebhost.com/admin/configproducts.php?action=create) its showing the error when i click on continue Fatal error: Call to a member function getUpgradeProductIds() on a non-object in /home/dolphi20/public_html/admin/configproducts.php on line 0. would you please somebody help me so i can solve the issue Thank you in advance.