I added the reward points full suite module and I'm getting an error message when I go to the reward points configuration.

This is the message:

call_user_func(UseRewardPointStateFunction) [function.call-user-func]: First argument is expected to be a valid callback in /home/content/t/h/3/th3who/html/shop/myadmin/includes/functions/general.php on line 1544

Can somebody please help me figure out a solution to this error. I'm sure it's something simple but I am new to this stuff and have no idea what to do.

Thanks in advance for your help,