Error CS1502 in script

Hello !

I have importing KFGMapsystem but i have 2 error :

KGFCore/KGFGUIUtility/scripts/editor/KGFEditor.cs(15,37): error CS1502: The best overloaded method match for 'KGFGUIutilityEditor.RenderKGFInspector(KGFEditor, System.type, Action)' has some invalid arguments

KGFCore/KGFGUIUtility/scripts/editor/KGFEditor.cs(15,37): error CS1503: argument '#3' connot convert 'method group' expression to type 'Action'

 using System;
 using System.Collections.Generic;
 using System.Reflection;
 
 using UnityEditor;
 using UnityEngine;
 
 public class KGFEditor : Editor
 {
     static List<string> itsAlreadySentWarnings = new List<string>();
     
     public override sealed void OnInspectorGUI ()
     {
         KGFGUIUtility.SetSkinIndex(0);
         KGFGUIUtilityEditor.RenderKGFInspector(this,this.GetType(),CustomGui);
         KGFGUIUtility.SetSkinIndex(1);
     }
     
     protected virtual void CustomGui()
     {
     }
     
     public static KGFMessageList ValidateKGFEditor(UnityEngine.Object theTarget)
     {
         KGFMessageList aMessageList = new KGFMessageList();
         return aMessageList;
     }
     
     /// <summary>
     /// this class will call the validate method of the inspector
     /// </summary>
     /// <param name="theGameObject"></param>
     public static KGFMessageList ValidateEditor(UnityEngine.Object theObject)
     {
         KGFMessageList aMessageList = new KGFMessageList();
         string anObjectName = theObject.GetType().ToString();
         string aTypeName = anObjectName+"Editor";
         Type aType = Type.GetType(aTypeName);
         if(aType != null)
         {
             MethodInfo aMethodInfo = aType.GetMethod("Validate"+aTypeName,System.Reflection.BindingFlags.Static | BindingFlags.Public);
             if(aMethodInfo != null && aMethodInfo.GetParameters().Length == 1)
             {
                 object[] aParameters = new object[1];
                 aParameters[0] = theObject;
                 aMessageList = (KGFMessageList)aMethodInfo.Invoke(null,aParameters);
             }
             else
             {
                 if (!itsAlreadySentWarnings.Contains(aTypeName))
                 {
                     itsAlreadySentWarnings.Add(aTypeName);
                     aMessageList.AddWarning("static method Validate"+aTypeName+"() not implemented in: "+aTypeName);
                     Debug.LogWarning("static method Validate() not implemented in: "+aTypeName);
                 }
             }
         }
         else
         {
             if (!itsAlreadySentWarnings.Contains(aTypeName))
             {
                 itsAlreadySentWarnings.Add(aTypeName);
                 aMessageList.AddWarning("type: "+aTypeName+" not implemented.");
                 Debug.LogWarning("type: "+aTypeName+" not implemented.");
             }
         }
         return aMessageList;
     }
 }

I need help please.

Thancks