I am having the same problem. Was told by technical support that it was a problem with the Live Player tool, what ever is that. Gave no indication when the problem will be solved.
Errors like these are without a doubt connectivity issues, but they are NOT in house connectivity issues. As stated, and I can confirm, HULU, Netflix, Amazon Video, and YouTube all stream FLAWLESSLY, without freezing or buffering through any of the 10 devices I own to stream on. Your Spectrum app is the ONLY one which constantly freezes, rebuffers, and suffers from degraded picture quality. The apps have been uninstalled and reinstalled numerous times since I first began using Spectrum Streaming. It performs the same on all 4 of my Roku players, as well as my Xbox One. You can read your troubleshooting teleprompter and recite the typical troubleshooting tactics, but you need to think outside of the box here and as a consumer. Your service is the ONLY service out of numerous other streaming services with these issues. Unless your app requires double the bandwidth as your competition, you have an engineering flaw that needs to be addressed if you want to continue to be looked at as a serious streaming competitor. All the consumer wants to hear is that your company admits to a flaw in your streaming service which can provide the quality and performance of other streaming services, but you are looking into the concern and a possible solution.
I just signed up with Spectrum to have the streaming service and it worked fine for a week. Now, I can barely get it to work at all. I'm getting the RLP-999 error code. It is extremely frustrating because as stated be others, all of my other apps are functioning normally.
Just posted the following in another thread:
Some observations thanks to the insight of the person who posted the "press up 5-6 times" tip to get the stats. I did this and saw a horrendous 406 bitrate, thus explaining the poor picture although the menus etc from the app were fine. Looking at the local NBC live via their app had a great picture; same via the Spectrum app very poor. This is not a network issue, no other app has the same issue and Roku reported excellent connectivity and signal.
Wondering if perhaps there was a newer app version, I deleted and reinstalled and got the same 4.15.1 dated December 3rd 2018. But interesting when it came up on default channel 1 - Spectrums news channel - there was a great picture. Back to NBC and same again, great picture and the bit rate was up to over 4000 but subsequent tests averaged around the 3600 mark. Major improvement and a couple of checks later, still good. Flipped back to cable box for now until I am convinced - and load all apps needed.
Today I arced it up and not only was the picture crap again but worse and showing a bitrate of 211. Back and forth checking a few channels, rebooted Roku, even re associated network made no difference excpet to get up to around the 406 mark. Again, local NBC great on the NBC app. Out of interest, lets uninstall and reinstall app - and again same 4.15.1 and again a great picture with over 3600 bit rate. I'll keep poking at this but maybe this information is useful and of interest to Spectrum to perhaps get to the bottom of these issues that seem to be random but perhaps with a developing pattern.