2.5 Conversion User Error

I am in the process of updating my application to 2.5, however one of the errors i get is when i try to navigate to the next page of users i get an error. I am able to add new users and edit the ones on the first page but when i press the next button for the next lot of users i get the following error: Thanks Simon
1 answers

Can you file a bug in the Partner Portal? Thanks!