Please double-check that:
1. You haven't accidentally locked your card. You can check this in the "Card" section on the Spending tab.
2. All of your card details have been entered correctly (PIN, CVV, or expiration date), if you're using your card online.
If your card is still not working for some other reason, please reach out to us via the chat function in the app or email us at email@example.com and we'll follow this up!