Link to seller info in backend returns blank page

This is really urgent, I don't understand how this happened.
When I access a customer that is also a seller and then I click on Seller Info Link I get a blank page.
Is there another way to access seller info?
How can this be fixed?
When I access a customer that is also a seller and then I click on Seller Info Link I get a blank page.
Is there another way to access seller info?
How can this be fixed?