Donation not accepted?

[AndreVanLooy]

Strange... my gold Mastercard got refused?

[Zenju]

The bank returned the decline code generic_decline, and did not provide any other information. We recommend that your customer contact their card issuer

network_decline_code: 83

https://developer.mastercard.com/mastercard-send-person-to-person/documentation/response-error-codes/network-response-codes/
83 Fraud/Security (Mastercard use only)

Not much to go on from here, unfortunately...