@cweavertx_gmail_com live tv/dvr was free for a LIMITED period of time, if it worked before but no longer does, then it seems the free period is over and you will need a plex pass to use live tv/dvr+tuner.
see @
Update (March 2020):
Get Live TV and 48 hours of guide data free for the next 90 days (through June), no Plex Pass needed! DVR recording will continue to require a Plex Pass subscription.
if you are looking for the FREE LIVE TV FROM PLEX, then you may need to click MORE > scroll to the bottom left side > LIVE TV ON PLEX
> 
this icon 
requires a supported TV tuner AND plex pass.
this icon 
is the free live tv, does not require plex pass, does not require plex server.
