After opening a new eBay account and posting your first few listings, it is quite common to receive an account suspension. eBay says it restricts or suspends accounts as a safety measure to protect their community against fraud or any other negative impact. They do this so that you can verify who you are in person.
eBay will send you an email to your registered eBay account email address and to your eBay messages explaining why this has happened. They will also let you know what you need to do so that it can be reinstated.
Important: An error message will be sent to your Printify account stating that your account is suspended. Printify cannot publish or update your listings unless your account is reactivated.
More details on eBay account suspension.