I have adjusted my php notice settings, so the notice line is no longer showing, however there is definately a problem.
As you can see from the screenshot attached, when a customer has gone through checkout (using the credit card, or paypal payment pro method) they are presented with a blank screen.
The "Thank you for your purchase" text is up in the top left corner of the screen, and there is nothing in the space where it should be. My customers are going to assume their order didn't work, this is going to cause great confusion.
My site is now LIVE so I need to fix this urgently. Your help would be appreciated.