PayPal Community

It appears to be an error in Paypal related to the handling of the encrypted hidden values. The error does not generate on the un-encrypted versions of buttons but continues on the encrypted versions. ... View more

This error is occuring on my site with no code changes in the HTML.   It appears to be a change/error in the way that PayPal handles the cookie, as deleting the cookie allows a single item to be added to cart again.   The second item added then triggers the error (item order is irrellevant).   This occurs even in a simple HTML page with only the items and buttons in it.   Anyone have any other thoughts/ideas on work arounds or recently reported bugs that might explain this behaviour? ... View more