Root Cause

• Invalid payment method state: The payment method is not in a valid state for processing transactions.
• Interrupted previous transactions: Incomplete or interrupted prior transactions left the payment method in an inconsistent state.
• Temporary gateway issue: The payment gateway encountered an unexpected state while processing the transaction.
• Gateway integration errors: Incorrect API request sequence or invalid state transitions in the payment flow.

Troubleshooting and Solutions

Ask the customer to

• Retry the transaction after a short interval.
• Verify the payment method is active and correctly set up for processing.
• If issue persists, ask the customers to add the payment method again before retrying.
• Contact the payment gateway support team if the issue persists across multiple attempts.