How can I get help with my issue?

I try to order my pdf file but there is this screen

so i want to know is it my google pay or shopify or it is portone that has a problem

and please giveme the solution i have try to slove this for morethan 3 hours

https://checkout.portone.cloud/?ref=2fkxskQiVLcMQdnEgTeafWVF9gP

Hi there, @Athan0r . Thank you for taking the time to reach out to the Shopify Community with your question, and your screenshot. My name is Imogen. It’s good to meet you.

Based on the screenshot you’ve shown, it looks like the error is housed on PortOne, and not on Shopify, so we wouldn’t be able to advise on what steps to take to resolve it. With that being said, the error clearly states that you need to add some payment methods to PortOne, so I recommend starting there!