onBlockBreak phantom event

When I run ./gradlew runClient it loads up the game, and all seems well. However, when I attack any block, it crashes giving:

[13:03:05] [Client thread/FATAL] [minecraft/Minecraft]: Unreported exception thrown!
java.lang.NoSuchFieldError: drill
      at net.skkkitzo.konstant.EventHandlerCommon.onBlockBreak(EventHandlerCommon.java:29) ~[EventHandlerCommon.class:?]
     at net.minecraftforge.fml.common.eventhandler.ASMEventHandler_6_EventHandlerCommon_onBlockBreak_BreakSpeed.invoke(.dynamic) ~[?:?]
     at net.minecraftforge.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:90) ~[ASMEventHandler.class:?]
       at net.minecraftforge.fml.common.eventhandler.EventBus.post(EventBus.java:182) ~[EventBus.class:?]
     at net.minecraftforge.event.ForgeEventFactory.getBreakSpeed(ForgeEventFactory.java:199) ~[ForgeEventFactory.class:?]
   at net.minecraft.entity.player.EntityPlayer.getDigSpeed(EntityPlayer.java:916) ~[EntityPlayer.class:?]
 at net.minecraftforge.common.ForgeHooks.blockStrength(ForgeHooks.java:264) ~[ForgeHooks.class:?]
       at net.minecraft.block.Block.getPlayerRelativeBlockHardness(Block.java:702) ~[Block.class:?]
   at net.minecraft.block.state.BlockStateContainer$StateImplementation.getPlayerRelativeBlockHardness(BlockStateContainer.java:420) ~[BlockStateContainer$StateImplementation.class:?]
   at net.minecraft.client.multiplayer.PlayerControllerMP.clickBlock(PlayerControllerMP.java:269) ~[PlayerControllerMP.class:?]
   at net.minecraft.client.Minecraft.clickMouse(Minecraft.java:1630) ~[Minecraft.class:?]
 at net.minecraft.client.Minecraft.processKeyBinds(Minecraft.java:2376) ~[Minecraft.class:?]
    at net.minecraft.client.Minecraft.runTickKeyboard(Minecraft.java:2147) ~[Minecraft.class:?]
    at net.minecraft.client.Minecraft.runTick(Minecraft.java:1935) ~[Minecraft.class:?]
    at net.minecraft.client.Minecraft.runGameLoop(Minecraft.java:1188) ~[Minecraft.class:?]
        at net.minecraft.client.Minecraft.run(Minecraft.java:442) [Minecraft.class:?]
  at net.minecraft.client.main.Main.main(Main.java:118) [Main.class:?]
   at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_251]
  at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_251]
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_251]
        at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_251]
     at net.minecraft.launchwrapper.Launch.launch(Launch.java:135) [launchwrapper-1.12.jar:?]
       at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.12.jar:?]
  at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_251]
  at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_251]
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_251]
        at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_251]
     at net.minecraftforge.gradle.GradleStartCommon.launch(GradleStartCommon.java:97) [start/:?]
    at GradleStart.main(GradleStart.java:25) [start/:?]

Now forgive me if I'm wrong, but I'm a bit confused about this. Because according to this line

at net.skkkitzo.konstant.EventHandlerCommon.onBlockBreak(EventHandlerCommon.java:29) ~[EventHandlerCommon.class:?]

I have a class called EventHandlerCommon in the package net.skkkitzo.konstant, which I do not. The class is actually located in the package net.skkkitzo.konstant.handlers.

And even more confusing, it says line #29 is the culprit.... but that is the line of my class. Is gradle using the wrong code or something? I am completely baffled.

28. @Mod.EventBusSubscriber
29. public class EventHandlerCommon {
30. 	
31.	// @SubscribeEvent
32. // public static void onMining(BreakSpeed event) {	
33.	// 	EntityPlayer player = (EntityPlayer) event.getEntity();

Any help is much appreciated. Using the latest version