Ash here from the Shopify team. Welcome to the Shopify Community!
I understand you're trying to complete a test order and are running into some troubles. I'm happy to help out with this! In order to assist, I'll need to get some more information first on what's going on here. Could you please reply back here and provide some additional information on this situation? Here is what I need to know:
Please reply back here to let me know the above, and please also include a screenshot of the error message you're seeing. Looking forward to hearing back!
Thank you for getting back to me with that information. Moving forward, could you please complete the following:
I look forward to hearing back so we can continue to work through this together!