So, I have been unsuccessful on multiple Roku's and a Firestick. I got my mom's login info and tried it. No go. It works on my phone, but not anywhere else.
I called Spectrum, as it suggested. (Since they are notorious for having poor customer service, I came here first.) The gentleman had no idea what was going on. He tried a couple of things (looked to see if something was misconfigured in the account, which I knew wasn't the case since multiple different logins I tried didn't work - just too coincidental if both were misconfigured.) Stumped, he asked coworkers and his boss. Other's interest was piqued and they started playing around. In the chaos of all of this, someone overheard the discussion at the Spectrum office and chimed in.
Apparently, there is an issue between all Disney apps (they own ESPN) and Spectrum at this time. There is a miscommunication to verify successful activation and Spectrum account information. They said both parties are aware of the issue and both are working diligently to correct it. So, it's a wait and see thing at this time.
Wish I had better news.