Thank you for the screenshots showing the error message. In this situation the best next step is to contact our live support where they can authenticate your account and review the domain status through the domain host.
If this is a brand new domain, please ensure you also check the email address you used to register the domain (Registrar information) for an email from the domain host with further steps. It’s important to also double check your spam/junk as well.
To contact our live support for additional help, please follow this link: Shopify Help Center - Contact Support, sign into your store account, search for your issue and use the contact support button at the bottom of the search results to see all our live support options.