Have been using USPS and UPS modules on my second Zen Cart and, after 4 months, the modules disappear and an error shows up in the cart saying that either or both don't ship to a particular address.
I tried removing and reinstalling them. They both work, then one doesn't, then both don't. I removed UPS, thinking maybe there's some kind of conflict between the two. Placed a test order with USPS and it worked. Tried to place another test order and it was gone again.
HELP!!!
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