Doesn't appear to be an issue on PayPal's end. I just attempted to print a label from eBay for a completely unrelated transaction and got a similar error message on eBay's side. It's probably an issue with the API that USPS uses to interface with various eCommerce platforms. Just have to wait and assume they're triaging the problem right now.
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Try clearing your cookies and temporary internet files. Your browser may have cached the error page instead of directing you to the label.
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Prompted "500 - Internal server error" when I purchased a label via PayPal. Both the initial print and reprint flows both bring me to the same error page (right). Anyone else having this problem?
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