I'm having the same problem. Everything was working fine then screen went black. I restarted kodi and I'm now getting the unable to load channels message. Tried resetting the Mac, clearing data, cleaned the cache. I'm using Kodi 16 Jarvis on a MXQ805 OTT TV BOX.
work on avov 2 box fuse hard change channels and stalker is running fine
OK back up..at 2:00...was down for a couple of hours....I know it was not me..........
got to wait