I just updated my USPS Shipping Module after reading the sticky about the 5/12 update and I'm still getting this message when I reach the shipping area in my cart:
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We are unable to find a USPS shipping quote suitable for your mailing address and the shipping methods we typically use.
If you prefer to use USPS as your shipping method, please contact us for assistance.
(Please check that your Zip Code is entered correctly.)
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Why is that?