Halifax - Payment of 11p failing - received 500 Response

Customer attempted a payment of 11p - On 08/08/19 @ 13:06 - text received from Halifax confirming the payment is being progressed however no payment was made

fapi id - 64413534-d187-41b2-9d23-8017acab4049

Payload data below.

""Data"" : {
""PaymentId"" : ""d92540f3-1d62-4348-a44c-9c814d4cf853"",
""Initiation"" : {
""InstructionIdentification"" : ""ff5c10493f264f87bcd3da54a675dd4e"",
""EndToEndIdentification"" : ""0a7a93cd5b4c4cd4a766e28ec3fd28c"",
""InstructedAmount"" : {
""Amount"" : ""0.11"",
""Currency"" : ""GBP""
},
""DebtorAccount"" : {
""SchemeName"" : ""SortCodeAccountNumber"",
""Identification"" : ""11xxxxxxxxxxxx"",
""Name"" : ""Reward Current Account""
},
""CreditorAccount"" : {
""SchemeName"" : ""SortCodeAccountNumber"",
""Identification"" : ""11xxxxxxxxxxxx"",
""Name"" : ""jamain graveney""
},
""RemittanceInformation"" : {
""Reference"" : ""JG003""

received a response

HTTP STATUS=500; payload={"errors":[{"id":"d27ddd6e-a9d0-45ca-9a8d-3f181fd9b8d3","code":"ASPSP_EXTERNAL_ERROR","title":"Open banking call failed due to an external error."}]}::END-OF-RESPONSE::