I had the exact same problem and when searching for the fix, I found this thread. For the record, I have an Xfinity cable subscription, so why I’d see an error relating to Spectrum TV, is beyond me. This is clearly a bug and It’s annoying as **bleep**, but I was able to get past it. I hit the back button and the error message went away and it brought up a screen with options to watch (for 10 minutes), or sign in. I figured I’d do the latter for the umpteenth time, and while I was reaching for my iPad to activate/enter the code, after a minute or so, it just went away and It just let me in as it should have in the first place. Really frustrating, but I was finally able to watch what I wanted. Hope that helps you guys. Considering how buggy this app is, maybe it will work for you, maybe not. Good luck!