These errors keep popping up on server log with 5.0.7.2 on 2.0.2 Radix-Core for 1.7.10 with forge 10.13.4.1448. Something to do with the villagers trying to sleep?

19:38:44 ERROR: [mca] No mapping found for requested phrase ID: sleep.invalid

java.lang.Throwable
at radixcore.lang.LanguageManager.getString(LanguageManager.java:185) [LanguageManager.class:?]
at mca.entity.EntityHuman.say(EntityHuman.java:683) [EntityHuman.class:?]
at mca.entity.EntityHuman.say(EntityHuman.java:697) [EntityHuman.class:?]
at mca.ai.AISleep.onUpdateServer(AISleep.java:97) [AISleep.class:?]
at mca.ai.AIManager.onUpdate(AIManager.java:45) [AIManager.class:?]
at mca.entity.EntityHuman.func_70071_h_(EntityHuman.java:307) [EntityHuman.class:?]
at net.minecraft.world.World.func_72866_a(World.java:2655) [ahb.class:?]
at net.minecraft.world.WorldServer.func_72866_a(WorldServer.java:837) [mt.class:?]
at net.minecraft.world.World.func_72870_g(World.java:2607) [ahb.class:?]
at net.minecraft.world.World.func_72939_s(World.java:2423) [ahb.class:?]
at net.minecraft.world.WorldServer.func_72939_s(WorldServer.java:669) [mt.class:?]
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:954) [MinecraftServer.class:?]
at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:431) [lt.class:?]
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:809) [MinecraftServer.class:?]
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:669) [MinecraftServer.class:?]
at java.lang.Thread.run(Unknown Source) ?:1.8.0_51: Unexpected exception/(Stacktrace for non-fatal error.). null