I found that it was caused by my tv being connect wired with a lan cable and my phone in wifi. They have to be on the same network. Apparently on the same wifi is what they actually meant.
Depending upon which model of TCL Roku you have your "eco" (eco friendly) mode settings may be found in more than one way. There are your Roku settings which are found by just going to settings and (as prior contributors have said) switching off (unchecking) the low power mode settings...BUT. (this is what worked for me) you also need to change the low power picture setting by clicking on a channel and watching something and then (using your regular manual remote) pressing the star or options button and finding the picture settings there. As soon as I changed the picture setting to normal instead of a low power picture setting the Roku app started working. Hope this helps!
I found that it was caused by my tv being connect wired with a lan cable and my phone in wifi. They have to be on the same network. Apparently on the same wifi is what they actually meant.
Must be a glitch with the app. Both of my devices were connected to wifi - same network. But if someone else has the issue they now have a variety of things to try lol
Definitely was that for me. I switched back to wired and immediately it stopped working. Switch back again and working again. Maybe yours just needed a reset to get ip addresses right or something. Glad we both got it fixed!
Same thing happens to me, no solution. Please help
Try logging out of app on phone & switch devices
Make sure both devices connected to the same wifi
Factory reset TV (last resort)
Depending upon which model of TCL Roku you have your "eco" (eco friendly) mode settings may be found in more than one way. There are your Roku settings which are found by just going to settings and (as prior contributors have said) switching off (unchecking) the low power mode settings...BUT. (this is what worked for me) you also need to change the low power picture setting by clicking on a channel and watching something and then (using your regular manual remote) pressing the star or options button and finding the picture settings there. As soon as I changed the picture setting to normal instead of a low power picture setting the Roku app started working. Hope this helps!