How do I fix WARNING: coremods are present:

[KermitWithAShotgun2]

Could somebody help me troubleshoot with this issue I've been having, My minecraft has been crashing immediately as I start it. I checked my crash-reports folder but I'm not very much able to troubleshoot what is going on, let alone how to fix it

 

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---- Minecraft Crash Report ----

WARNING: coremods are present:
  XaeroMinimapPlugin (Xaeros_Minimap_FP21.15.0.1_Forge_1.12.jar)
  TheBetweenlandsLoadingPlugin (TheBetweenlands-3.7.3-SNAPSHOT-20210322.022210-core.jar)
  weaponlib (mw_2.0-0.4.6.2_mc1.12.2.jar)
  XaeroWorldMapPlugin (XaerosWorldMap_1.16.0_Forge_1.12.jar)
  ItemPatchingLoader (ItemPhysic_Full_1.4.34_mc1.12.2.jar)
  SCFMLCorePlugin (StalkerCreepers-1.12.1.jar)
  TransformLoader (DynamicSurroundings-1.12.2-3.6.2.1.jar)
  ForgelinPlugin (Forgelin-1.8.4 (1).jar)
  CreativePatchingLoader (CreativeCore_v1.10.63_mc1.12.2.jar)
  FutureMC (future-mc-1.12.2-0.2.6.1.jar)
  LoadingPlugin (Bloodmoon-MC1.12.2-1.5.3.jar)
Contact their authors BEFORE contacting forge

// This doesn't make any sense!

Time: 8/25/21 5:44 PM
Description: Initializing game

java.lang.NoClassDefFoundError: de/johni0702/minecraft/betterportals/impl/aether/common/blocks/BlockBetterAetherPortal
    at de.johni0702.minecraft.betterportals.impl.aether.common.ExtensionsKt$initAether$2.invoke(Extensions.kt:54)
    at de.johni0702.minecraft.betterportals.impl.aether.common.ExtensionsKt$initAether$2.invoke(Extensions.kt)
    at de.johni0702.minecraft.betterportals.impl.BetterPortalsMod.registerBlocks(BetterPortalsMod.kt:148)
    at net.minecraftforge.fml.common.eventhandler.ASMEventHandler_222_BetterPortalsMod_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.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:497)
    at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
    at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
Caused by: java.lang.ClassNotFoundException: de.johni0702.minecraft.betterportals.impl.aether.common.blocks.BlockBetterAetherPortal
    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)
    ... 19 more
Caused by: java.lang.NoClassDefFoundError: com/legacy/aether/blocks/portal/BlockAetherPortal
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:760)
    at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
    at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:182)
    ... 21 more
Caused by: java.lang.ClassNotFoundException: com.legacy.aether.blocks.portal.BlockAetherPortal
    at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:101)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    ... 25 more