Danny, stop telling people to remove unused channels as a solution to this problem. It's insulting. First of all, that's the obvious first thing anyone would do when receiving that message, before coming here, and it's not the solution. But more importantly, THAT'S NOT THE WAY ROKU IS DESIGNED TO WORK. You are supposed to be able to have as many channels as you want, Roku will delete the least used channels to make room when you need it and re-download them the next time you use them. I have had Roku since the original. This is how they work. You know this. You also must know this a KNOWN bug with the Express unit for years, that they supposedly already fixed, and yet you are acting like it's the consumer's fault for having too many channels. Nope, this one is all on Roku software developers.
I was a beta tester for this device and this was an early bug that WAS fixed but apparently another update has caused the error to return. I can watch Plex and Netflix but neither YouYube nor YouTubeTV will load due to 'space' issues. At first, a reboot fixed it, but no longer. A channel re-install worked the first time but no longer. I have two Express devices, both are doing it, one intermittently, the other always now to the point where I cannot use it. $65 a month for YouTubeTV that I can only watch on my phone now. Going to look for my old Fire stick.
I've already deleted the few channels I don't want, but I refuse to delete the rest. I've had this many channels on Roku since the early models that had much less onboard memory with no issues. People are having this same issue with only a couple of channels. More importantly, I CAN STILL ADD CHANNELS. So it's not really out of space, it just won't open certain channels. I also refuse to do a full system reset as I will lose a login I no longer have access to. Not to mention, the numerous people here who you told to do that, and it still did not fix this issue!! If I have to set up all those channels again, I will just get a new Chromecast.
The fact that both my devices started misbehaving the same day causes me to believe it is more likely a software issue than a hardware one, and the other posts I've seen here seem to confirm a recent software update is the culprit. It angers me that you seem to be denying this and placing the blame on the consumer side. So take a few of your coders off whatever new money-grabbing features they are working on and devote their efforts toward fixing this issue first.