Fixed an issue with Cataclysm classic not having the "ENCOUNTER_LOOT_RECEIVED" event.

boot.lua

@@ -17,8 +17,8 @@
 		local addonName, Details222 = ...
 		local version, build, date, tocversion = GetBuildInfo()
 
-		Details.build_counter = 12800
-		Details.alpha_build_counter = 12800 --if this is higher than the regular counter, use it instead
+		Details.build_counter = 12801
+		Details.alpha_build_counter = 12801 --if this is higher than the regular counter, use it instead
 		Details.dont_open_news = true
 		Details.game_version = version
 		Details.userversion = version .. " " .. Details.build_counter

frames/window_mythicplus/window_end_of_run.lua

@@ -84,7 +84,10 @@ _G.MythicDungeonFrames = mythicDungeonFrames
 --frame to handle loot events
 local lootFrame = CreateFrame("frame", "DetailsEndOfMythicLootFrame", UIParent)
 lootFrame:RegisterEvent("BOSS_KILL")
-lootFrame:RegisterEvent("ENCOUNTER_LOOT_RECEIVED")
+
+if (C_EventUtils.IsEventValid("ENCOUNTER_LOOT_RECEIVED")) then
+	lootFrame:RegisterEvent("ENCOUNTER_LOOT_RECEIVED")
+end
 
 --register the loot players looted at the end of the mythic dungeon
 lootFrame.LootCache = {}