That's odd. If it was working before and now it's just timing out, I'd try a few different cards first to see if it's happening with all of them.
I've found that when Tap to Pay isn't even recognizing the card, it usually feels more like a phone/app issue than a card issue.
If you've already gone through all the troubleshooting steps, you may need Square to take a look on their end. Let us know what you find out—I’m curious what the culprit ends up being.
