I can't refer a freelancer for this invite I've got, can someone help

[hassanwaqar71]

Hi, I want to refer a friend for this invitation I had, but when I do it says" error loading this page contact upwork support for more information" my internets fine. 
I don't think theres any cookie problem either

What do I do? 

[PradeepH]

Hi Hassan,

Thank you for your message. I will have our support team contact you for further assistance.        

Thank you,

Pradeep