1.12 crash

[InterVi]

[16:34:07] [User Authenticator #14/INFO]: UUID of player InterVi is 35d7370a-3bf2-3aad-baa2-346f8d5c2352
[16:34:07] [Server thread/WARN]: Failed to handle packet for broadband-46-242-8-199.moscow.rt.ru/46.242.8.199:53694
java.lang.RuntimeException: class net.minecraft.server.v1_12_R1.TileEntityBeacon is missing a mapping! This is a bug!
at net.minecraft.server.v1_12_R1.TileEntity.c(TileEntity.java:59) ~[spigot-1.12.jar:git-Spigot-b78586d-2585751]
at net.minecraft.server.v1_12_R1.TileEntity.save(TileEntity.java:52) ~[spigot-1.12.jar:git-Spigot-b78586d-2585751]
at net.minecraft.server.v1_12_R1.TileEntityContainer.save(TileEntityContainer.java:17) ~[spigot-1.12.jar:git-Spigot-b78586d-2585751]
at net.minecraft.server.v1_12_R1.TileEntityBeacon.save(TileEntityBeacon.java:281) ~[spigot-1.12.jar:git-Spigot-b78586d-2585751]
at net.minecraft.server.v1_12_R1.TileEntityBeacon.d(TileEntityBeacon.java:263) ~[spigot-1.12.jar:git-Spigot-b78586d-2585751]
at net.minecraft.server.v1_12_R1.PacketPlayOutMapChunk.(SourceFile:52) ~[spigot-1.12.jar:git-Spigot-b78586d-2585751]
at net.minecraft.server.v1_12_R1.PlayerChunk.sendChunk(PlayerChunk.java:147) ~[spigot-1.12.jar:git-Spigot-b78586d-2585751]
at net.minecraft.server.v1_12_R1.PlayerChunk.a(PlayerChunk.java:66) ~[spigot-1.12.jar:git-Spigot-b78586d-2585751]
at net.minecraft.server.v1_12_R1.PlayerChunkMap.addPlayer(PlayerChunkMap.java:287) ~[spigot-1.12.jar:git-Spigot-b78586d-2585751]
at net.minecraft.server.v1_12_R1.PlayerList.a(PlayerList.java:286) ~[spigot-1.12.jar:git-Spigot-b78586d-2585751]
at net.minecraft.server.v1_12_R1.PlayerList.onPlayerJoin(PlayerList.java:377) ~[spigot-1.12.jar:git-Spigot-b78586d-2585751]
at net.minecraft.server.v1_12_R1.PlayerList.a(PlayerList.java:162) ~[spigot-1.12.jar:git-Spigot-b78586d-2585751]
at net.minecraft.server.v1_12_R1.LoginListener.b(LoginListener.java:159) ~[spigot-1.12.jar:git-Spigot-b78586d-2585751]
at net.minecraft.server.v1_12_R1.LoginListener.e(LoginListener.java:57) ~[spigot-1.12.jar:git-Spigot-b78586d-2585751]
at net.minecraft.server.v1_12_R1.NetworkManager.a(NetworkManager.java:233) ~[spigot-1.12.jar:git-Spigot-b78586d-2585751]
at net.minecraft.server.v1_12_R1.ServerConnection.c(ServerConnection.java:140) [spigot-1.12.jar:git-Spigot-b78586d-2585751]
at net.minecraft.server.v1_12_R1.MinecraftServer.D(MinecraftServer.java:842) [spigot-1.12.jar:git-Spigot-b78586d-2585751]
at net.minecraft.server.v1_12_R1.DedicatedServer.D(DedicatedServer.java:405) [spigot-1.12.jar:git-Spigot-b78586d-2585751]
at net.minecraft.server.v1_12_R1.MinecraftServer.C(MinecraftServer.java:678) [spigot-1.12.jar:git-Spigot-b78586d-2585751]
at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:576) [spigot-1.12.jar:git-Spigot-b78586d-2585751]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_131]
[16:34:07] [Server thread/INFO]: InterVi зашёл
[16:34:07] [Server thread/INFO]: InterVi lost connection: Internal server error
[16:34:07] [Server thread/INFO]: InterVi вышел

[16:34:44] [Server thread/ERROR]: Failed to save chunk
java.lang.RuntimeException: class net.minecraft.server.v1_12_R1.TileEntityBeacon is missing a mapping! This is a bug!
at net.minecraft.server.v1_12_R1.TileEntity.c(TileEntity.java:59) ~[spigot-1.12.jar:git-Spigot-b78586d-2585751]
at net.minecraft.server.v1_12_R1.TileEntity.save(TileEntity.java:52) ~[spigot-1.12.jar:git-Spigot-b78586d-2585751]
at net.minecraft.server.v1_12_R1.TileEntityContainer.save(TileEntityContainer.java:17) ~[spigot-1.12.jar:git-Spigot-b78586d-2585751]
at net.minecraft.server.v1_12_R1.TileEntityBeacon.save(TileEntityBeacon.java:281) ~[spigot-1.12.jar:git-Spigot-b78586d-2585751]
at net.minecraft.server.v1_12_R1.ChunkRegionLoader.a(ChunkRegionLoader.java:317) ~[spigot-1.12.jar:git-Spigot-b78586d-2585751]
at net.minecraft.server.v1_12_R1.ChunkRegionLoader.a(ChunkRegionLoader.java:128) [spigot-1.12.jar:git-Spigot-b78586d-2585751]
at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot-1.12.jar:git-Spigot-b78586d-2585751]
at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot-1.12.jar:git-Spigot-b78586d-2585751]
at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1052) [spigot-1.12.jar:git-Spigot-b78586d-2585751]
at org.bukkit.craftbukkit.v1_12_R1.CraftWorld.save(CraftWorld.java:748) [spigot-1.12.jar:git-Spigot-b78586d-2585751]
at org.bukkit.craftbukkit.v1_12_R1.CraftWorld.save(CraftWorld.java:739) [spigot-1.12.jar:git-Spigot-b78586d-2585751]
at autosaveworld.features.save.AutoSaveThread.saveWorldNormal(AutoSaveThread.java:159) [AutoSaveWorld.jar:?]
at autosaveworld.features.save.AutoSaveThread.saveWorld(AutoSaveThread.java:150) [AutoSaveWorld.jar:?]
at autosaveworld.features.save.AutoSaveThread.performSaveNow(AutoSaveThread.java:81) [AutoSaveWorld.jar:?]
at autosaveworld.core.AutoSaveWorld.onDisable(AutoSaveWorld.java:157) [AutoSaveWorld.jar:?]
at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:266) [spigot-1.12.jar:git-Spigot-b78586d-2585751]
at org.bukkit.plugin.java.JavaPluginLoader.disablePlugin(JavaPluginLoader.java:361) [spigot-1.12.jar:git-Spigot-b78586d-2585751]
at org.bukkit.plugin.SimplePluginManager.disablePlugin(SimplePluginManager.java:421) [spigot-1.12.jar:git-Spigot-b78586d-2585751]
at org.bukkit.plugin.SimplePluginManager.disablePlugins(SimplePluginManager.java:414) [spigot-1.12.jar:git-Spigot-b78586d-2585751]
at org.bukkit.craftbukkit.v1_12_R1.CraftServer.disablePlugins(CraftServer.java:346) [spigot-1.12.jar:git-Spigot-b78586d-2585751]
at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:464) [spigot-1.12.jar:git-Spigot-b78586d-2585751]
at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:612) [spigot-1.12.jar:git-Spigot-b78586d-2585751]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_131]