SS IPTV

Hi I have a Lg SmArt tv with the SSIPTV app on it, however I cannot get any channel to play.

I have added urls to the editor and they show on my tv and when I select the channel it shows it trying to load, tells me what the next program will be and then says unable to play.

I have no idea what to do, or if anyone can help me or if anyone has any places I can get tv channel urls from