Did you ever get this resolved? I'm curious if you know what the problem wound up being..?? I've seen this happen a lot with VT, and it can be difficult to troubleshoot with the lack of error information. As a PayPal partner, we built our own Virtual Terminal on PayPal Commerce Platform that utilizes the "Advanced Credit Card" integration within that. We've noticed that there are fewer issues like this when using the API's vs. using VT directly, and when a problem does occur we typically get better error information back from the API so it's easier to troubleshoot. Also, as a bonus, you'll get a rate of 2.69% per transaction with our VT as opposed to the 3.09% that PayPal charges for their VT directly, so you can save some money as well as avoid some of the headaches. 🙂
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