There are 5 different versions labeled as a Roku 2. Three are officially no longer supported, and the remaining two are now 6 1/2 and 8 years old, regardless how long you've had them. That's why you were asked what model you have.
Frankly, a newer Roku would far outperform even the newest of the Roku 2 players (the 4210 was the most recent model). The latest Express 4K+ has double the operating memory, eight times the channel storage memory, and a far, far faster processor. You would also get 4K/HDR/Dolby Vision support. Even if your existing TV isn't 4K, your next one very likely will be.
As to the minstra player, Roku doesn't create or support 3rd party channels. It's entirely possible that the channel developer stopped supporting it. I looked in the channel store and found nothing with that name. Roku only removes channels that are in violation of their licensing agreement. The usual cause for that is offering content without the legal authorization to do so. I'm not saying that is what happened, as I have no personal idea myself.
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