Whats the deal? m8

[Roach46]

Ok, using an M8, latest kodi installed, all the channels on the stalker client work, epg working no issues, what the deal is iptv stalker addon, have entered all the correct info, many times, and it will not open, i keep getting "custom mac 1 invalid", followed all the tutorials, both the client and addon worked fine until they went private, would like to get into the addon for the vod, thanks in advance for any help

Forgot to add, bout a week or so ago, put kodi and iptv on my ipad, and stalker addon works perfect