Forge Server Crash 1.12.2

When I add the iron chest plugin to my server, my server crashes
 
Crash report:
 

---- Minecraft Crash Report ----
// Uh... Did I do that?

Time: 16.03.2021 20:33
Description: Exception in server tick loop

java.lang.IllegalArgumentException: Block: class cpw.mods.ironchest.common.blocks.chest.BlockIronChest has property: variant with invalidly named value: ıron
    at net.minecraft.block.state.BlockStateContainer.func_185919_a(BlockStateContainer.java:117)
    at net.minecraft.block.state.BlockStateContainer.<init>(BlockStateContainer.java:77)
    at net.minecraft.block.state.BlockStateContainer.<init>(BlockStateContainer.java:62)
    at cpw.mods.ironchest.common.blocks.chest.BlockIronChest.func_180661_e(BlockIronChest.java:182)
    at net.minecraft.block.Block.<init>(Block.java:234)
    at net.minecraft.block.Block.<init>(Block.java:243)
    at cpw.mods.ironchest.common.blocks.chest.BlockIronChest.<init>(BlockIronChest.java:64)
    at cpw.mods.ironchest.common.core.IronChestBlocks$Registration.registerBlocks(IronChestBlocks.java:110)
    at net.minecraftforge.fml.common.eventhandler.ASMEventHandler_9_Registration_registerBlocks_Register.invoke(.dynamic)
    at net.minecraftforge.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:90)
    at net.minecraftforge.fml.common.eventhandler.EventBus$1.invoke(EventBus.java:144)
    at net.minecraftforge.fml.common.eventhandler.EventBus.post(EventBus.java:182)
    at net.minecraftforge.registries.GameData.fireRegistryEvents(GameData.java:845)
    at net.minecraftforge.fml.common.Loader.preinitializeMods(Loader.java:630)
    at net.minecraftforge.fml.server.FMLServerHandler.beginServerLoading(FMLServerHandler.java:99)
    at net.minecraftforge.fml.common.FMLCommonHandler.onServerStart(FMLCommonHandler.java:333)
    at net.minecraft.server.dedicated.DedicatedServer.func_71197_b(DedicatedServer.java:125)
    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:486)
    at java.lang.Thread.run(Unknown Source)

A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- System Details --
Details:
    Minecraft Version: 1.12.2
    Operating System: Windows 10 (amd64) version 10.0
    Java Version: 1.8.0_281, Oracle Corporation
    Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
    Memory: 527563880 bytes (503 MB) / 821559296 bytes (783 MB) up to 5726797824 bytes (5461 MB)
    JVM Flags: 1 total; -Xmx6G
    IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
    FML: MCP 9.42 Powered by Forge 14.23.5.2854 11 mods loaded, 11 mods active
    States: 'U' = Unloaded 'L' = Loaded 'C' = Constructed 'H' = Pre-initialized 'I' = Initialized 'J' = Post-initialized 'A' = Available 'D' = Disabled 'E' = Errored

    | State | ID            | Version           | Source                             | Signature                                |
    |:----- |:------------- |:----------------- |:---------------------------------- |:---------------------------------------- |
    | LCH   | minecraft     | 1.12.2            | minecraft.jar                      | None                                     |
    | LCH   | mcp           | 9.42              | minecraft.jar                      | None                                     |
    | LCH   | FML           | 8.0.99.99         | forge.jar                          | e3c3d50c7c986df74c645c0ac54639741c90a557 |
    | LCH   | forge         | 14.23.5.2854      | forge.jar                          | e3c3d50c7c986df74c645c0ac54639741c90a557 |
    | LCH   | jei           | 4.15.0.297        | jei_1.12.2-4.15.0.297.jar          | None                                     |
    | LCH   | appleskin     | 1.0.9             | AppleSkin-Mod-1.12.jar             | None                                     |
    | LCH   | waila         | 1.8.26            | Hwyla-Mod-1.12.2.jar               | None                                     |
    | LCH   | ironchest     | 1.12.2-7.0.67.844 | ironchest-1.12.2-7.0.72.847.jar    | None                                     |
    | LCH   | morpheus      | 1.12.2-3.5.106    | Morpheus-Mod-1.12.2.jar            | None                                     |
    | LCH   | elevatorid    | 1.3.14            | OpenBlocks-Elevator-Mod-1.12.2.jar | None                                     |
    | LCH   | waterstrainer | 3.2.0             | Water-Strainer-Mod-1.12.2.jar      | None                                     |

    Loaded coremods (and transformers): 
    Profiler Position: N/A (disabled)
    Is Modded: Definitely; Server brand changed to 'fml,forge'
    Type: Dedicated Server (map_server.txt)