So I downloaded the AT&T Mobile Banking app from the app store and was surprised to see my bank was available to use with it, as it's a small credit union. I entered all my information, got the security code sent to my email, and entered it. But when I entered the code, I got this error message. I tried again like three times and still got the same thing. Anyone else ever run into this problem with the app? Is it with the app or my bank?