I am still having this problem. I cannot play live TV remotely. I can play recordings - that is very reliable, but I am almost never able to play live TV. It maybe works 5% of the time. Seems if I power cycle the tablo, then it will work for a couple days that is only thing that helps.
Twice recently the Tablo came up in conversation and I take out my phone it show it off, thinking the problem is solved and instead I am simply greeted with 'Player Error' - same screenshot as above. All other aspects of remote access work - recordings, viewing guide, changing settings, etc..
I've been in contact with support since February to no avail (#15188). They've finally responded that they don't have any solution. Did anyone else in this thread figure it out? Asking since I notice an absence of recent posts - gives me hope someone figure out the issue.