Hello there so to install :

sudo -s
cd /var/lib/plexmediaserver/Library/Application Support/Plex Media Server/Plug-ins
git clone https://github.com/taligentx/LiveTVH.bundle

Now go to plex :

parameter -- extension LiveTVH

add u user name and password tvheadend :

go un web page plex :

i can't see the plugin how to activate it please ?

nothing in my home page

thanks