I am also having the problem. No problem with internet access on computer or phone. Happening on 3 of 4 my Roku but have not confirmed rarely used other one. Tried removing and reloading app with continued same results.
My Photo Stream is displaying the same issue as the others. The Photo Streams title card comes up, clips briefly to black, and back to the title card again, where it stays. I do have photos loading in the Photo Streams portion of my account, and it was working a couple of days ago, but now this.
Same problem here. If I select the app or go through the settings menu I get the same results. The Photo Stream screen shows then goes blank then pops back up and freezes. Worked fine for 2 days and now nothing.
Started yesterday photo stream screensaver stopped working on all 4 Rokus. 2 rokus are Roku TVs one Roku is Roku premier and the other Roku is a stick. When you go to the Roku photo stream channel you just see the opening title “Roku Photo Streams”. I changed to other screensavers and they work so I’m guessing problem is with photo streams channel