52x LogTracker\LogTracker-1.2.0.lua:199: bad argument #1 to 'gsub' (string expected, got nil)
[string "=[C]"]: in function gsub' [string "@LogTracker\LogTracker-1.2.0.lua"]:199: in function <LogTracker\LogTracker.lua:198> [string "=(tail call)"]: ? [string "@LogTracker\LogTracker-1.2.0.lua"]:374: in function GetPlayerZonePerformance'a
[string "@LogTracker\LogTracker-1.2.0.lua"]:407: in function SendPlayerInfoToChat' [string "@LogTracker\LogTracker-1.2.0.lua"]:136: in function OnChatMsgSystem'
[string "@LogTracker\LogTracker-1.2.0.lua"]:101: in function <LogTracker\LogTracker.lua:97>

Locals:
(*temporary) = nil
(*temporary) = "%%w"
(*temporary) = 14
(*temporary) = "string expected, got nil"

I'm pretty sure I fixed that one independend from your report already, if the issue persists with the current version, please update the error message and I'll have a closer look.