Place Test Order says my store has no storefront domain configured. What do I do?

The Place Test Order button opens your live store address in a new tab. That error means your admin session doesn't know your store's web address yet.

Try these steps:

1. Sign out of the admin and sign back in, so your store details are loaded again.
2. If you've just changed your domain on Settings → Web Settings → Custom Domain, make sure it shows as your Current domain and isn't still awaiting nameservers.
3. Click Place Test Order again.

If it still fails, contact Wcart support so they can check your store's address.