package info.u_team.u_team_core;

import org.apache.logging.log4j.*;

import info.u_team.u_team_core.util.annotation.AnnotationManager;
import info.u_team.u_team_core.util.verify.JarSignVerifier;
import net.minecraftforge.fml.common.Mod;

@Mod(UCoreMod.MODID)
public class UCoreMod {
	
	public static final String MODID = "uteamcore";
	public static final Logger LOGGER = LogManager.getLogger("UTeamCore");
	
	public UCoreMod() {
		JarSignVerifier.checkSigned(MODID);
		
		AnnotationManager.callAnnotations(MODID);
	}
}

package info.u_team.u_team_core;

import org.apache.logging.log4j.*;

import info.u_team.u_team_core.intern.config.ClientConfig;
import info.u_team.u_team_core.util.annotation.AnnotationManager;
import info.u_team.u_team_core.util.verify.JarSignVerifier;
import net.minecraftforge.fml.ModLoadingContext;
import net.minecraftforge.fml.common.Mod;
import net.minecraftforge.fml.config.ModConfig.Type;

@Mod(UCoreMod.MODID)
public class UCoreMod {
	
	public static final String MODID = "uteamcore";
	public static final Logger LOGGER = LogManager.getLogger("UTeamCore");
	
	public UCoreMod() {
		JarSignVerifier.checkSigned(MODID);
		
		ModLoadingContext.get().registerConfig(Type.CLIENT, ClientConfig.CONFIG);
		
		AnnotationManager.callAnnotations(MODID);
	}
}

--- 
+++ 
@@ -2,12 +2,9 @@
 
 import org.apache.logging.log4j.*;
 
-import info.u_team.u_team_core.intern.config.ClientConfig;
 import info.u_team.u_team_core.util.annotation.AnnotationManager;
 import info.u_team.u_team_core.util.verify.JarSignVerifier;
-import net.minecraftforge.fml.ModLoadingContext;
 import net.minecraftforge.fml.common.Mod;
-import net.minecraftforge.fml.config.ModConfig.Type;
 
 @Mod(UCoreMod.MODID)
 public class UCoreMod {
@@ -18,8 +15,6 @@
 	public UCoreMod() {
 		JarSignVerifier.checkSigned(MODID);
 		
-		ModLoadingContext.get().registerConfig(Type.CLIENT, ClientConfig.CONFIG);
-		
 		AnnotationManager.callAnnotations(MODID);
 	}
 }
Remove the old config register call