Server don't start, help please!!

svjacksv_YT joined the game

18[11:48:35] [Server thread/ERROR]: Encountered an unexpected exception

19net.minecraft.util.ReportedException: Ticking block entity

20 at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:642) ~[MinecraftServer.class:?]

21 at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:334) ~[lt.class:?]

22 at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:547) ~[MinecraftServer.class:?]

23 at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:427) [MinecraftServer.class:?]

24 at net.minecraft.server.MinecraftServer$2.run(MinecraftServer.java:685) [li.class:?]

25Caused by: java.lang.NullPointerException

26 at ic2.core.block.machine.tileentity.TileEntityElectricEnchanter.getEnchantmentCount(TileEntityElectricEnchanter.java:474) ~[TileEntityElectricEnchanter.class:?]

27 at ic2.core.block.machine.tileentity.TileEntityElectricEnchanter.getAnvilCost(TileEntityElectricEnchanter.java:435) ~[TileEntityElectricEnchanter.class:?]

28 at ic2.core.block.machine.tileentity.TileEntityElectricEnchanter.updateCost(TileEntityElectricEnchanter.java:149) ~[TileEntityElectricEnchanter.class:?]

29 at ic2.core.block.machine.tileentity.TileEntityElectricEnchanter.func_145845_h(TileEntityElectricEnchanter.java:88) ~[TileEntityElectricEnchanter.class:?]

30 at net.minecraft.world.World.func_72939_s(World.java:1939) ~[ahb.class:?]

31 at net.minecraft.world.WorldServer.func_72939_s(WorldServer.java:489) ~[mt.class:?]

32 at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:636) ~[MinecraftServer.class:?]

33 ... 4 more

34[11:48:35] [Server thread/ERROR]: This crash report has been saved to: /aternos/server/./crash-reports/crash-2018-11-14_11.48.35-server.txt

35[11:48:35] [Server thread/INFO]: Stopping server

36[11:48:35] [Server thread/INFO]: Saving players

37[11:48:35] [Server thread/INFO]: Saving worlds

38[11:48:35] [Server thread/INFO]: Saving chunks for level 'world'/Overworld

39[11:48:35] [Server thread/INFO]: Saving chunks for level 'world'/Nether

Quote from Roman

Do you have a custom modded server or a modpack.

Which mods are installed on your server?

Tekkit Legends

Quote from Roman

Probably a bug in the modpack or your world got corrupted

And what can I do?