AssetsPluginsGitHubEditorUnityAPIWrapper.cs(5,13): error CS0234: The type or namespace name ‘VersionControl’ does not exist in the namespace ‘Unity’ (are you missing an assembly reference?) I need help with this. im using 2021.3.16lts

using UnityEditor;
using UnityEngine;
using System.IO;
using System;
using Unity.VersionControl.Git;

namespace GitHub.Unity
{
    [InitializeOnLoad]
    public class UnityAPIWrapper : ScriptableSingleton<UnityAPIWrapper>
    {
        static UnityAPIWrapper()
        {
#if UNITY_2018_2_OR_NEWER
            Editor.finishedDefaultHeaderGUI += editor => {
                UnityShim.Raise_Editor_finishedDefaultHeaderGUI(editor);
            };
#endif
        }
    }
}

If i remove the Unity.VersionControl.Git i face another error.