Why Service Error?

[eugie]

I want to buy windows phone developer account, then i linked my debit card to my PayPal account. But when i click confirm purchase, Service error. Your payment account is not valid. What's wrong please?

 

[Silviu Bogusevschi]

AFAIK the developer account itself is free.
Check this link
All you need to know about the Windows Phone 8.1 'Preview for Developers' | Windows Phone Central