What does unsupported card type mean?

"Unsupported card type" refers to a situation where a payment system or transaction platform does not recognize or accept the type of credit or debit card being used. This can occur due to various reasons, such as the card being from an incompatible network, being expired, or the merchant not having the necessary agreements in place to process that specific card type. It's essential to check with the payment provider or use a different card to complete the transaction.