Hi, @Xshopping .
Welcome to the Shopify Community.
I’d like to gather more context on the issue. Could you provide information on the following:
- Is this issue at checkout affecting all customers or specific customers?
- For the orders not being processed, could you check your Orders > Abandoned Checkouts section for any additional error messages?
- Could you clarify which payment method and gateway this is occurring on?
- Are you able to replicate the error at checkout?
Here is a troubleshooting step to try out in the meantime:
- Double-check the credentials you’re receiving from the third party payment gateway match and that you’re entering them correctly.
Looking forward to your reply!