I was wondering if they were going to update this addon, and seems no, but can make it works just changing 2 files as follows:

Quote :

Fix for this is super simple but you have to apply it.

BattlegroundTargets.toc, Line 1:

Quote :

## Interface: 50300

Replace with

## Interface: 60000

BattlegroundTargets.lua, Line 228:

Quote :

local maxLevel = 90

Replace with

local maxLevel = 100

Now go and own on bgs.

It works!