Error message with my payment

Problem

When paying for a workshop on the platform, an error message is shown.

For example:

Here are the various causes and actions to be taken:

Error code mentioned in the message	Meaning	What to do?

Error code mentioned in the message	Meaning	What to do?
card_declined	The card was declined for an unknown reason or the payment was blocked. The cause of the refusal may be that the post code entered does not match the one your bank has.	The customer should contact the card issuer for more information.
card_not_supported	This type of purchase is not supported by this credit card.	The customer should contact the card issuer for more information.
card_velocity_exceeded	The customer has exceeded the balance or credit limit available on their credit card.	The customer should contact the card issuer for more information.
currency_not_supported	The specified currency is not supported by this credit card.	The customer should contact the card issuer for more information.
expired_card	The bank card has expired.	The customer should contact the card issuer for more information.
incorrect_number	The credit card number is wrong.	The customer must try again with the correct credit card number.
incorrect_cvc	The CSC or CVC or CVV code is wrong.	The customer must try again with the correct CSC or CVC or CVV.