I also have the same problem >_< The message reads:
We are not able to process your payment using your PayPal account at this time. Please return to the merchant's website and try using a different payment method (if available).
Anyway, this is the response they sent to my 1:1, which I think is bogus D:
I think the paypal limit is $200-250 a month, not 100% sure. I doubt you reached that.