Yep. It didn’t work for me either. I also couldn’t get it to work from the web app or from the Tablo Plex channel. I commented on that in this thread and Tablo responded there: Recommended Android Tablets
I bought the Fire HD 10 primarily for Tablo, so I sent it back. I was loathe to do it as I did like the tablet itself for a low budget large screen device, but I just don’t want to wait to see if the Tablo issues get resolved. Seems like the Tablo people have a lot on their plate, so that could be a while. I figured I could always buy it again if it got resolved sooner, but I ended up getting a Samsung instead.