My Mum’s website uses PayPal for handling product orders, however after adding the PayPal “Add to Cart” code to a WordPress Post page I kept getting “We Were Unable To Decrypt The Certificate Id” error at PayPal.

It turns out after adding the code in HTML mode you need to go back to Visual mode and click Update/Publish.

Do this and the error goes away, people can happily buy your products and send you praise

Peace
Ant