Have had this before - try to access payment info and get:
We apologise for the inconvenience - our engineers have been notified of this problem and are working to resolve it. Please try again later.
Had this all day yesterday and is still there. Need to do my quarterly accounts so need to print the payment information.
I can access information of payments before being migrated to the new payment system so I guess the problem is with the new system. But not affecting everyone? You will all be looking for PIP soon!