Here, I'm experiencing the same. As for me, locations aside from America(Asia, Europe for instance) worked just fine until 2 days ago. But now every location, including America don't work. Even the symptoms are just as you stated: Us-only series does not appear anymore. Just to be sure I've updated it up to the recent version.
@HS-Devil Turbo is no longer part of Opera.
If you can access the site using the VPN, then it means that the site (or your ISP or government, etc) is blocking your access.
If other browsers can access the site, try using an extension to change the Opera's user agent to see if it helps.