"The transaction ID in your link is invalid."
* Have you recently changed your PayPal Password? If yes, go to your ebay account, unlink your paypal then re link it. Once you do it asks for paypal email and paypal password.
* Check your email addresses both in eBay and PayPal, make sure they match. You could have an old address listed and the payment was sent to that old address.
* Is you PayPal email address confirmed. For example, you recently changed your PayPal email address or added a second email address and did not confirm it.
