That could be why.. even though you're not in a blocked region, some content could accidentally be blocked, just because you're not in the mainland of the United States. Let Roku know, and they should be able to fix it.
NO, it's the channel, same with me, could access it since the Roku channel started and now all of a sudden no luck. I can still get everything else but the Roku channel. Something is going on with them, which is kinda crazy since we use an actual Roku. It's not where you are, I'm in Texas.
I purchased three new Roku and they are garbage, use to be good. I guess like any company, as soon as they make it big they start trying to make more money by making cheaper junk. I never had a problem with my older ones but the new ones I've only had a few months are already having issues, not just one but all of them.