We've recently changed the configurations needed for the secure subdomain. Hence, if you come across the "This connection is not private" error while trying to complete an order at your store website, check if your website's secure subdomain is pointing to secure.{hostname}.cdn.vtex.com, where {hostname} is the complete address of your store.
What has changed?​
The secure subdomain must now point to secure.{hostname}.cdn.vtex.com, where {hostname} is the complete address of your store. Before, the secure subdomain was being pointed to {account}.vtexcommercestable.com.br.
What needs to be done?​
If you come across the "This connection is not private" error in your store website, repeat the Hosting a FastStore + VTEX website guide, making sure that the secure subdomain is pointing to secure.{hostname}.cdn.vtex.com.