[WARNING] [HealthBar] Task #210 for HealthBar v1.7.1 generated an exception
java.lang.AbstractMethodError: com.earth2me.essentials.User.getHealth()D
at com.gmail.filoghost.healthbar.DamageListener$6.run(DamageListener.java:372)
at org.bukkit.craftbukkit.v1_6_R3.scheduler.CraftTask.run(CraftTask.java:53)
at org.bukkit.craftbukkit.v1_6_R3.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:345)
at net.minecraft.server.v1_6_R3.MinecraftServer.t(MinecraftServer.java:524)
at net.minecraft.server.v1_6_R3.DedicatedServer.t(DedicatedServer.java:227)
at net.minecraft.server.v1_6_R3.MinecraftServer.s(MinecraftServer.java:488)
at net.minecraft.server.v1_6_R3.MinecraftServer.run(MinecraftServer.java:421)
at net.minecraft.server.v1_6_R3.ThreadServerApplication.run(SourceFile:583)