Update 1/11/21: After trying to get help with this with no result (because PayPal customer support can't help something that doesn't affect a specific transaction), they finally routed me to "file a ticket with our merchant technical support team. They can be [sic] at by going to www.paypal.com/mts." This wasn't intuitive, and initially the link to https://www.paypal-support.com/ routed me back to this forum [face palm]. I tried again and eventually by clicking on the "contact us" option, it sent me to https://www.paypal-support.com/s/contactsupport and prompted me to log in and submit a question to the support team, which I assume is what they meant by "open a ticket". I submitted my issue and hope they can resolve this. The error is still popping up every time I go in to print off and ship my shopping cart orders.
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