Jean13 (and everyone else):
What Roku device are you having this issue with?
I have rechecked my Roku device which had successfully updated to OS 14.5 previously, by performing a manual update today and did not see a newer update error.
I think what's happened is that you cleared the cache which fixes your immediate issue in which the Roku errors out and shows that blank wallpaper screen, but you didn't do the next step of attempting to manually update to the newest 14.5 OS. By not manually updating the Roku device, after a certain amount of time, Roku will try again to push the OS 14.5 update and you'll get that error until Roku resolves this.
I have since updated my 1st post on the top of page 10 of this thread to include how to manually update the Roku -- this information is now at the bottom of that post. My 2nd post on page 10 has more of a step-by-step approach which you may find more user-friendly as this addressed the prior poster who had performed a factory rest and apparently the issue returned on that person's Roku TV.
I don't know if these steps will work on all Roku devices, so another option is when that update screen pops up, to just leave it alone, and see -- if after a few minutes, it begins to automatically update your Roku as that may also resolve this issue since a couple Roku Express devices of the same model didn't have this error when they auto-updated and restarted themselves. If this doesn't work, another option you can try is when that update-screen appears, to turn off the TV which puts the Roku into sleep mode, and come back to it after an hour or so to see if it automatically has updated to OS 14.5. You can see what OS you're on by going to the manual update screen.
Update:
Today (4/24/25) my Roku Ultra 4660RW and my Roku 3 have updated to the newest OS 14.5.4 without any issues.
