---- Minecraft Crash Report ----

WARNING: coremods are present:
Contact their authors BEFORE contacting forge

// You're mean.

Time: 9/22/19 6:16 PM
XRay version: 58
Description: Initializing game

java.lang.NoSuchMethodError: net.minecraft.block.properties.PropertyBool.create(Ljava/lang/String;)Lnet/minecraft/block/properties/PropertyBool;
    at omtteam.omlib.blocks.BlockCable.<clinit>(BlockCable.java:25)
    at omtteam.omlib.init.OMLibBlocks.initBlocks(OMLibBlocks.java:16)
    at omtteam.omlib.handler.OMLibEventHandler.blockRegisterEvent(OMLibEventHandler.java:76)
    at net.minecraftforge.fml.common.eventhandler.ASMEventHandler_37_OMLibEventHandler_blockRegisterEvent_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:775)
    at net.minecraftforge.fml.common.Loader.preinitializeMods(Loader.java:628)
    at net.minecraftforge.fml.client.FMLClientHandler.beginMinecraftLoading(FMLClientHandler.java:252)
    at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:466)
    at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:377)
    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:497)
    at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
    at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

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

-- Head --
Thread: Client thread
Stacktrace:
    at omtteam.omlib.blocks.BlockCable.<clinit>(BlockCable.java:25)
    at omtteam.omlib.init.OMLibBlocks.initBlocks(OMLibBlocks.java:16)
    at omtteam.omlib.handler.OMLibEventHandler.blockRegisterEvent(OMLibEventHandler.java:76)
    at net.minecraftforge.fml.common.eventhandler.ASMEventHandler_37_OMLibEventHandler_blockRegisterEvent_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:775)
    at net.minecraftforge.fml.common.Loader.preinitializeMods(Loader.java:628)
    at net.minecraftforge.fml.client.FMLClientHandler.beginMinecraftLoading(FMLClientHandler.java:252)
    at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:466)

-- Initialization --
Details:
Stacktrace:
    at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:377)
    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:497)
    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: Windows 10 (amd64) version 10.0
    Java Version: 1.8.0_51, Oracle Corporation
    Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
    Memory: 579530912 bytes (552 MB) / 805306368 bytes (768 MB) up to 4294967296 bytes (4096 MB)
    JVM Flags: 8 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx4G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M
    IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
    FML: MCP 9.42 Powered by Forge 14.23.5.2768 Optifine OptiFine_1.12.2_HD_U_D3 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                                |
    |:----- |:------------------ |:------------ |:--------------------------------------- |:---------------------------------------- |
    | UCH   | minecraft          | 1.12.2       | minecraft.jar                           | None                                     |
    | UCH   | mcp                | 9.42         | minecraft.jar                           | None                                     |
    | UCH   | FML                | 8.0.99.99    | forge-1.12.2-14.23.5.2768.jar           | e3c3d50c7c986df74c645c0ac54639741c90a557 |
    | UCH   | forge              | 14.23.5.2768 | forge-1.12.2-14.23.5.2768.jar           | e3c3d50c7c986df74c645c0ac54639741c90a557 |
    | UCH   | securitycraft      | v1.8.12.1    | [1.12.2]+SecurityCraft+v1.8.12.1.jar    | None                                     |
    | UCH   | xray               | 2.0.0        | Advanced-XRay-Mod-1.12.2.jar            | None                                     |
    | UCH   | backpack           | 3.0.2        | Backpacks-Mod-1.12.2.jar                | None                                     |
    | UCH   | xaerobetterpvp     | 1.18         | BetterPvP_1.18_Forge_1.12.jar           | None                                     |
    | UCH   | inventorysorter    | 1.13.3+57    | inventorysorter-1.12.2-1.13.3+57.jar    | None                                     |
    | UCH   | omlib              | 3.1.3-246    | omlib-1.12.2-3.1.3-246-dev.jar          | None                                     |
    | UCH   | openmodularturrets | 3.1.4-356    | openmodularturrets-1.12.2-3.1.4-356.jar | None                                     |

    Loaded coremods (and transformers):
    GL info: ' Vendor: 'Intel' Version: '3.1.0 - Build 9.17.10.4459' Renderer: 'Intel(R) HD Graphics 3000'
    Launched Version: 1.12.2-forge1.12.2-14.23.5.2768
    LWJGL: 2.9.4
    OpenGL: Intel(R) HD Graphics 3000 GL version 3.1.0 - Build 9.17.10.4459, Intel
    GL Caps: Using GL 1.3 multitexturing.
Using GL 1.3 texture combiners.
Using framebuffer objects because OpenGL 3.0 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: 4x Intel(R) Core(TM) i5-2430M CPU @ 2.40GHz

As it says in the report, contact their authors BEFORE contacting forge.
So it would be best to contact the authors of omlib as that seems to be what's the issue.