Problem has been corrected. Although I've done this many times over the past 2 months, did it again last night. Removed the Spectrum app, and had added it back again to the roku. It worked on all 3 rokus, so I suspect that a new app version is available.
So, long story short and awhile with the tech on the phone, got this problem fixed. The tech "reauthorized" my modem. Then I unplugged the power to that same modem and my router for a few minutes. Repowered everything back, and this is what solved the problem. Now the Spectrum tv app works on all my devices (android phone and tablet, Roku stick, Roku 4 Ultra, and Roku 1 on my home network. I got to keep my own modem and router.
Sad that not everybody has experienced the same seamless upgrade I did. I seem to remember that the S500 error indicates something wrong on the TWC side, but I've only had that error once, and it appeared to resove itself (probably due to a bunch of people in some TWC building somewhere working frantically away).
My only thoughts on things like blurry screens are the usual troubleshooting:
If you've done all that and it still doesn't work, it's time to contact support directly. Anecdotally, my cable card stopped working recently and it was only after contacting support that they discovered my account had been split into two cities, meaning my equipment was receiving conflicting information. Odd things happen, and sometimes somebody just has to dig for the cause of the problem.
I literally just got off the phone with TWC explaining my frustration with them re:their techs not being able to help me, but I found an old discussion from 2014 that did! Here's what I did and hopefully it helps. We were having the same issue and it's now been fixed to no thanks at all to TWC tech support.
Log into your account on a computer by going to "my account" on TWC website.
Click on the troubleshoot tab
Then click on the "troubleshoot" buttom for your modem.
Click on "activate/connect modem"
Then click on "reset my modem"
This will take a few mins as it warns you.
Once I did this, the app worked again on ALL our devices. We use and truly enjoy the app a lot. We only have one cable box with TWC and a roku on all other tv's and have the app on our phones/tablets. It was very frustrating when it all of a sudden stopped working. I called about 5x and after the tech tried troubleshooting it in other ways (by simply asking questions) EVERY phone call ended with "yes, I've just received confirmation there is a reported outage of the app in your area and we have engineers currently working on it." One tech even mentioned it was due to the merger. Complete bull since it was fixed by doing the above for us.
I apologize for the frustration with the TWC TV app. There have been known issues across several platforms, including Roku. If the issue continues after restarting the Roku and the modem, please contact us directly by private message at TWC_ForumsHelp for assistance.
Social Media Customer Care
Community Forums Moderator
I apologize for the issues but we no longer support the Roku 1 and 2 the minimum requirement is Roku 3. The app may work at times but will not run smoothly.
The Roku 2 and Roku 3 are very similar however they have a different chipset.
Our system requirements are now Roku 3 models and up.
There were some recent updates to the TWC TV app for Roku. Usually, deleting the app and reinstalling it will resolve update issues. The Roku may need to be re-started through the Roku settings as well. If this does not resolve the issue, please let us know.
Thank you for your participation in the Forums!
TWC-Social Media Customer Care
TWC/ Spectrum/ Charter are inn business to make money and part is by renting out their boxes. And not support COAM gear be it modems, cable boxes, DVR's and supposedly "smart" TV's.
You need to complain to your state cable tv comission, the FCC and state attorney general. If you're in NC, good luck, your government was paid off to allow a monopoly in broadband and the only resolution is to get rid of your legislators who decided they have the right to overulke the FCC', get some competition that allows streaming services rather than be a reseller of services like the cable companies are.
What speed do you pay for, what do you get?
If you are running wireless, it's junk technology that doesn't support streaming video on anything but handheld devices with a small screen.
Copy and paste the modems signal level and log pages, don't reset it need to see real history
I do apologize the TWC TV app is not working correctly on the Roku. We are aware of an issue impacting customers and are working to resolve the issue as quickly as possible. We will be sure to update this post when more information is available.
Thank you for your participation in the Forums!
^TWC-Social Media Customer Care