Finally got the playlist and working again, had to call Samsung support, they sorted it remotely, a glitch in the install of the app apparently! Thanks for all your help and suggestions.
Contacting Smart IPTV is my only option now, the guy that supplies my service has tried everything the past 10 days since it went tits up!
Thanks for the replies guys, much appreciated!
I have the same issue!
It'll work through the same app on the fire stick, but doesn't on the tv!
I'm at my wits end, nobody seems to know what the issue is!:weary: