Which page are you trying to look at?
I too was having the same error when I tried to look at my rewards.
It seemed to happen right after moderator applied a manual adjustment to my account.
At the time, I didn't feel the need to contact moderators again to fix it.
Lo and behold, the problem fixed on its own after my next renewal.
So if it's something you need to see like your overview page, then you should contact moderators to take a look. Otherwise if it's not important, then it will likely repair itself in due time.
To contact moderators, click on the green question mark at bottom right to get started.
Enter your question into SIMon. Follow/invent prompts until you get to the Contact Us button, click it and a Submit Ticket button should appear.
