Before you try to use your Revolut card again, make sure there isn't a freeze or security lock on it in the app.
Check that the account has enough money in the right currency and that spending limits, location-based security, or merchant rules aren't stopping the transaction.
In the Cards part of the app, you can look over these choices again.
If everything seems fine, try taking the card out of your wallet and putting it back in again, or use a different computer.
Some stores don't accept Revolut virtual cards or cards issued in other countries, so using a physical card or a different way of payment could help.
Also, make sure that the latest version of your app is installed.
If the problem keeps happening, use the in-app chat to get help with your unique transaction.
They can look at the reason for the drop and help you quickly fix the problem.
❗ If not, explore Xolvie to read about the challenges others have faced and share your story.