Most weird, this seemed to be working perfectly a few weeks ago, now, it is doing nothing.
The client had gone through and updated all weights in ounces. I add a product, go to checkout, login, no UPS error, and no UPS options.
I looked at the weights, they had .532 ounces, seemed weird, so I bumped it to 15 ounces incase it was too low for UPS. Still no error or options.
I converted to lb / pounds and tried again, still no error or UPS options.
I have tried both domestic and international addresses, no difference.
Anything else I can check, because I know it WAS working fine, UPS was giving multiple options for shipping and multiple costs etc.
I can see no changes to the UPS plugin config at all.