Shooting in the dark here, as this is really unusual.
Is this your first Roku ever? Did you set up your Roku account brand new recently? Were you in the US when you set it up? Were you using a VPN when you set it up? Was this an older Roku account you recently reactivated? I'm trying to find any legit reason for your Roku account to be tied to anything outside the US.
Failing that, I'm going to suggest taking it back to whatever store you got it from and getting a different device.
FWIW, the Express 4K+ (3941) is a far superior device to the Express (3930) and is on sale. It's still $5 more, but a vastly superior device. Just a thought, since it may be something wrong with the device you bought, and replacing it may be in order.
Roku Community Streaming Expert
Note: I am not a Roku employee.
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