I created a mod but it didn't loaded, then i recreated my mod and i got the same issue. I looked into console and it says "Found non mod jar".

Code: 

package me.kailoren.showbalancemod;

import net.minecraft.block.Block;
import net.minecraft.item.Item;
import net.minecraftforge.event.RegistryEvent;
import net.minecraftforge.fml.common.event.FMLInitializationEvent;
import net.minecraftforge.fml.common.event.FMLPostInitializationEvent;
import net.minecraftforge.fml.common.event.FMLPreInitializationEvent;
import net.minecraftforge.fml.common.eventhandler.SubscribeEvent;
import net.minecraftforge.fml.common.Mod;
import net.minecraftforge.fml.common.registry.GameRegistry;

@Mod(
        modid = ShowBalanceMod.MOD_ID,
        name = ShowBalanceMod.MOD_NAME,
        version = ShowBalanceMod.VERSION
)
public class ShowBalanceMod {

    public static final String MOD_ID = "ShowBalanceMod";
    public static final String MOD_NAME = "ShowBalanceMod";
    public static final String VERSION = "1.0.1";

    /**
     * This is the instance of your mod as created by Forge. It will never be null.
     */
    @Mod.Instance(MOD_ID)
    public static ShowBalanceMod INSTANCE;

    /**
     * This is the first initialization event. Register tile entities here.
     * The registry events below will have fired prior to entry to this method.
     */
    @Mod.EventHandler
    public void preinit(FMLPreInitializationEvent event) {

    }

    /**
     * This is the second initialization event. Register custom recipes
     */
    @Mod.EventHandler
    public void init(FMLInitializationEvent event) {

    }

    /**
     * This is the final initialization event. Register actions from other mods here
     */
    @Mod.EventHandler
    public void postinit(FMLPostInitializationEvent event) {

    }

    /**
     * Forge will automatically look up and bind blocks to the fields in this class
     * based on their registry name.
     */
    @GameRegistry.ObjectHolder(MOD_ID)
    public static class Blocks {
      /*
          public static final MySpecialBlock mySpecialBlock = null; // placeholder for special block below
      */
    }

    /**
     * Forge will automatically look up and bind items to the fields in this class
     * based on their registry name.
     */
    @GameRegistry.ObjectHolder(MOD_ID)
    public static class Items {
      /*
          public static final ItemBlock mySpecialBlock = null; // itemblock for the block above
          public static final MySpecialItem mySpecialItem = null; // placeholder for special item below
      */
    }

    /**
     * This is a special class that listens to registry events, to allow creation of mod blocks and items at the proper time.
     */
    @Mod.EventBusSubscriber
    public static class ObjectRegistryHandler {
        /**
         * Listen for the register event for creating custom items
         */
        @SubscribeEvent
        public static void addItems(RegistryEvent.Register<Item> event) {
           /*
             event.getRegistry().register(new ItemBlock(Blocks.myBlock).setRegistryName(MOD_ID, "myBlock"));
             event.getRegistry().register(new MySpecialItem().setRegistryName(MOD_ID, "mySpecialItem"));
            */
        }

        /**
         * Listen for the register event for creating custom blocks
         */
        @SubscribeEvent
        public static void addBlocks(RegistryEvent.Register<Block> event) {
           /*
             event.getRegistry().register(new MySpecialBlock().setRegistryName(MOD_ID, "mySpecialBlock"));
            */
        }
    }
    /* EXAMPLE ITEM AND BLOCK - you probably want these in separate files
    public static class MySpecialItem extends Item {

    }

    public static class MySpecialBlock extends Block {

    }
    */
}

 

Fixed it, i just builded a project, not a runClient:/

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