I think it is the memory. I deleted a bunch of unused channels and did a system restart and it works now.
I have had this problem from quite some time now. I have done every single thing mentioned in this thread, and nothing helps. Actually, I had a 55” TCL Roku TV for a couple of years, and it had the problem of the thumbnails not showing up for numerous apps. I JUST purchased a new 65” TCL Roku TV, and the thumbnails fail to show for the EXACT SAME APPS. Can anyone help???
Paul
Thanks so much. Worked like a charm!
I had the same problem for weeks. Thank you this worked like a dream!
Using the restart feature worked with mine! Thank you for the help!
Your solution worked, thanks so much!
Thanks for this suggestion. I worked for me on an older RUKU TV.
Your solution of re starting from "system" worked for me, thank you
Worked PERFECTLY! Thank you! : )
Simple step still works in 2021. Unbelievable how many months of frustration endured and so many attempts have failed. Thanks Noach. Keep this solution posted.