Honestly, I don't know how this thread has so many people writing that this is "exactly the answer needed" and so forth when in fact it's EXACTLY NOT the answer.
Have you tried logging into P+ with your Roku password? This answer is valid and pertinent to folks WITH a P+ account who USE Roku to stream it. The question was posed for the problem of folks who PAY Roku to SUBSCRIBE and ALSO stream P+
As is so often the case it seems nobody bothered to properly read or understand the OP because an answer came in the addresses a similar but completely different problem. And frankly that Roku keeps sending me an freaking email every time some one of you read this the wrong way and there's still no fix for the OP posted problem that I share is frustrating as **bleep**.
I'm not taking a swipe at people this helps but we should stop maybe acting like this is the answer we've all been looking for, when it's only the answer, some of you apparently, are looking for.