Paypal subscription still unavailable

[unc0nn3cted]

Since 28 June I receive that message, when I try to subscribe using PayPal:

 

PayPal Express Checkout has become unavailable. Even though you authorized the

charge against your account earlier, the transaction has not completed. Your

PayPal account has not been charged, but your purchase in not completed. If you

backup with your browser, and click the button again, the problem at PayPal may

have cleared up. If it does not, then you should try again later. If the problem

persists, please let us know via the Site Feedback Forum, or the Contact Us page.

 

I used different browsers and many other things. Paypal Express Checkout works

perfectly - I've made some other purchases during that time and they have passed

as ok. Could anyone fix the photo.net engine please?