java.lang.AssertionError: This exception has no message.

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via GitHub by maxanier
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This exception has no message.
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This exception has no message.
java.lang.AssertionError:
at org.spongepowered.common.world.DimensionManager.sendDimensionRegistration(DimensionManager.java:159)
at net.minecraftforge.fml.common.network.handshake.NetworkDispatcher.completeServerSideConnection(NetworkDispatcher.java:239)
at net.minecraftforge.fml.common.network.handshake.NetworkDispatcher.access$100(NetworkDispatcher.java:54)
at net.minecraft.network.NetworkManager.func_74428_b(NetworkManager.java:289)
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:724)
at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:344)
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:605)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:481)
at java.lang.Thread.run(Unknown Source)

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