Capture or refund is failing in the Magento admin. Can you fix that?

Yes. Admin-side capture and refund failures usually trace to an expired API credential, a currency mismatch between the order and the gateway account, a transaction that was already settled / voided gateway-side, or a cURL connectivity error. We check the gateway transaction state, fix the credential or config, and confirm a clean capture and a partial refund both go through from the admin.