This is likely because you have multiple sites in your account, @M2C, and we don't yet support that in the app. If you don't need both sites, you can delete one with a desktop or laptop computer so you can use the app. To do that, log into Square, click on the Online link in your Square Dashboard to go to the Square Online overview page, then click on the grey sites dropdown and click the "..." button to find a delete option for a site.
