Message: ..\AddOns\BattleGroundEnemies\Main.lua line 1624:
attempt to index field 'bgSizeConfig' (a nil value)
Debug:
[string "@RCLootCouncil\Classes\Services\ErrorHandler.lua"]:149:
...dOns\RCLootCouncil\Classes\Services\ErrorHandler.lua:147
[string "@WagoAnalytics\WagoAnalytics.lua"]:72:
WagoAnalytics\WagoAnalytics.lua:70
[string "=[C]"]: ?
[string "@BattleGroundEnemies\Main.lua"]:1624: UpdatePlayerCount()
[string "@BattleGroundEnemies\Main.lua"]:3310: ?()
[string "@BattleGroundEnemies\Main.lua"]:127:
BattleGroundEnemies\Main.lua:124

Will be fixed in the next release