I have been creating and sending invoices to my only customer that I deal with through paypal since 2013 with no problems at all. Now, my customer gets the invoice and "clicks" on the "pay as guest" option. She gets an error message that says "unable to complete this at this time---try again later". So far, I have dealt with pay pal customer support and merchant tech services. They say there is nothing wrong on MY end. So what does my customer need to do to complete transaction???
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