Error Code: 500 using Planet Domains Module

[rickenbacker]

Hi, I am getting the error (below) while trying to register a domain at Planet Domain. I am using WHMCS 3.1, have all the fields set correct in the registrar module (Username/Password/ResellerID) and plenty of funds at Planet Domain. I've done plenty of searching but to no avail.

Error Code: 500 - Internal server errorServer returned: java.lang.NullPointerException

 

Hope someone can shed some light for me,

 

Cheers,

Mick