help i can't get into Update 58.1 because minecraft keeps crashing. help plz

I had the same problem too, check the bug reporting place, I don't have much of an idea of what is going on, but from the crash log I can see that it is because of a missing class, basically a thing, it was present when they packed the mod into the jar file but isn't when the mod is being loaded, I can't do much ut help the devs fix this. here is the crash log anyways

// But it works on my machine. well not mine and you guys want the Dalek mod to be accessible on all machines, right?

Time: 7/31/20 11:38 AM
Description: Initializing game

java.lang.NoClassDefFoundError: scala/actors/threadpool/Arrays
    at com.swdteam.common.init.DMBlocks.setupSlabItems(DMBlocks.java:606)
    at com.swdteam.common.init.DMBlocks.regBlocks(DMBlocks.java:588)
    at net.minecraftforge.fml.common.eventhandler.ASMEventHandler_20_DMBlocks_regBlocks_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.client.FMLClientHandler.beginMinecraftLoading(FMLClientHandler.java:252)
    at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:467)
    at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:378)
    at net.minecraft.client.main.Main.main(SourceFile:123)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
    at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
Caused by: java.lang.ClassNotFoundException: scala.actors.threadpool.Arrays
    at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:191)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    ... 18 more
Caused by: java.lang.NullPointerException


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

-- Head --
Thread: Client thread
Stacktrace:
    at com.swdteam.common.init.DMBlocks.setupSlabItems(DMBlocks.java:606)
    at com.swdteam.common.init.DMBlocks.regBlocks(DMBlocks.java:588)
    at net.minecraftforge.fml.common.eventhandler.ASMEventHandler_20_DMBlocks_regBlocks_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.client.FMLClientHandler.beginMinecraftLoading(FMLClientHandler.java:252)
    at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:467)

-- Initialization --
Details:
Stacktrace:
    at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:378)
    at net.minecraft.client.main.Main.main(SourceFile:123)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
    at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

-- System Details --
Details:
    Minecraft Version: 1.12.2
    Operating System: Mac OS X (x86_64) version 10.13.6
    Java Version: 1.8.0_151, Oracle Corporation
    Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
    Memory: 263851400 bytes (251 MB) / 1108869120 bytes (1057 MB) up to 4779933696 bytes (4558 MB)
    JVM Flags: 3 total; -Xmx5128m -Xms256m -XX:PermSize=256m
    IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
    FML: MCP 9.42 Powered by Forge 14.23.5.2854 Optifine OptiFine_1.12.2_HD_U_F5 7 mods loaded, 7 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-1.12.2-14.23.5.2854.jar                 | e3c3d50c7c986df74c645c0ac54639741c90a557 |
    | LCH   | forge       | 14.23.5.2854    | forge-1.12.2-14.23.5.2854.jar                 | e3c3d50c7c986df74c645c0ac54639741c90a557 |
    | LCH   | thedalekmod | (Update 58.1.0) | dm-58.1.jar                                   | None                                     |
    | LCH   | jei         | 4.15.0.287      | jei_1.12.2-4.15.0.287.jar                     | None                                     |
    | LCH   | journeymap  | 1.12.2-5.5.4    | journeymap-1.12.2-5.5.4 17.09.06 17.09.06.jar | None                                     |

    Loaded coremods (and transformers):
    GL info: ' Vendor: 'ATI Technologies Inc.' Version: '2.1 ATI-1.68.20' Renderer: 'AMD Radeon Pro 455 OpenGL Engine'
    Launched Version: forge-14.23.5.2854
    LWJGL: 2.9.2
    OpenGL: AMD Radeon Pro 455 OpenGL Engine GL version 2.1 ATI-1.68.20, ATI Technologies Inc.
    GL Caps: VboRegions not supported, missing: OpenGL 1.3, ARB_copy_buffer
Using GL 1.3 multitexturing.
Using GL 1.3 texture combiners.
Using framebuffer objects because ARB_framebuffer_object is supported and separate blending is supported.
Shaders are available because OpenGL 2.1 is supported.
VBOs are available because OpenGL 1.5 is supported.

    Using VBOs: No
    Is Modded: Definitely; Client brand changed to 'fml,forge'
    Type: Client (map_client.txt)
    Resource Packs:
    Current Language: English (US)
    Profiler Position: N/A (disabled)
    CPU: 8x Intel(R) Core(TM) i7-6820HQ CPU @ 2.70GHz
    OptiFine Version: OptiFine_1.12.2_HD_U_F5
    OptiFine Build: 20191204-141934
    Render Distance Chunks: 10
    Mipmaps: 4
    Anisotropic Filtering: 1
    Antialiasing: 0
    Multitexture: false
    Shaders: null
    OpenGlVersion: 2.1 ATI-1.68.20
    OpenGlRenderer: AMD Radeon Pro 455 OpenGL Engine
    OpenGlVendor: ATI Technologies Inc.
    CpuCount: 8

Redownload the mod, they fixed it, should e working, because it worked for me, credit to weirdo, https://swdteam.com/forum?p=thread&tid=8372&page=1#t_post_id_53154

thank u

How do you download a mod update?

Simply go to the Dalek Mod page and update it again! It should be U58.1. however, it is worth downloading it from curse forge now, as it is less buggy.