The login redirect URL from https://developer.paypal.com/docs/archive/adaptive-payments/integration-guide/APCommands/#adaptive-p... is totally broken right now.
Customers can't login or add payment methods when trying to make a payment because the parentSlider div has a -560px margin. There is supposed to be some kind of ham-fisted javascript 'slideIn' animation, but it currently throws:
Uncaught TypeError: Cannot read property 'slideIn' of undefined
... as soon as the page loads.
Therefore the actual part of the form where you can pay is not visible, making this product unusable for payments.
This looks like PayPal has updated some JS code recently without testing it and have broken everything again.
