Error building Player because scripts had compiler errors...

Unity Engine
1

Hello, can you help me?
I’m doing a project.
After what we’ve done several successful tests suddenly crashes Aunt.
What fault is it?

A tree couldn’t be loaded because the prefab is missing.
Please select any instance of the New Terrain asset in a scene and make it reference only tree prefabs that exist.

Assets/Terrain Assets/TerrainToolkit/Editor/TerrainToolkitEditor.cs(1048,82): warning CS0618: UnityEditor.EditorGUILayout.ObjectField(string, UnityEngine.Object, System.Type, params UnityEngine.GUILayoutOption[ ])' is obsolete: Check the docs for the usage of the new parameter ‘allowSceneObjects’.’

=
Assets/TypeOut/Scripts/TypeOutEditor.cs(3,7): error CS0246: The type or namespace name `UnityEditorInternal’ could not be found. Are you missing a using directive or an assembly reference?

Error building Player because scripts had compiler errors

my screen: Screenshot by Lightshot
Screenshot by Lightshot
How can this be remedied?
TypeOutEditor.cs
```csharp
**using UnityEngine;
using UnityEditor;
using UnityEditorInternal;
using System;

[CustomEditor(typeof(TypeOutScript))]
public class TypeOutEditor : Editor {

private string ontxt = "Turn On";

private SerializedObject TOS;
private SerializedProperty finalText;
private SerializedProperty On;
private SerializedProperty Reset;
private SerializedProperty TotalTypeTime;
private SerializedProperty TypeRate;
private SerializedProperty RandomCharacterChangeRate;

enum TimeModes {TotalTime = 0, TypeRate =1};
TimeModes TM = TimeModes.TotalTime;
private float Time = 0.5f;
private float RCCR = 0.1f;

public void OnEnable()
{
    if (target == null)
    {
        return;
    }

    TOS = new SerializedObject(target);
    finalText = TOS.FindProperty("FinalText");
    On = TOS.FindProperty("On");
    Reset = TOS.FindProperty("reset");
    TotalTypeTime = TOS.FindProperty("TotalTypeTime");
    TypeRate = TOS.FindProperty("TypeRate");
    RandomCharacterChangeRate = TOS.FindProperty("RandomCharacterChangeRate");
}


public override void OnInspectorGUI()
{
    TOS.Update();

    finalText.stringValue = ParseNewline(finalText.stringValue.Trim());

// EditorGUILayout.PropertyField(On);
// EditorGUILayout.PropertyField(Reset);

    EditorGUILayout.BeginHorizontal ();

    if(GUILayout.Button(ontxt))
    {
        if (On.boolValue == true)
        {
            On.boolValue = false;
            ontxt = "Turn On";
        }
        else
        {
            On.boolValue = true;
            ontxt = "Turn Off";
        }
    }

    if (On.boolValue == true)
    {
        ontxt = "Turn Off";
    }
    else
    {
        ontxt = "Turn On";
    }

    if(GUILayout.Button("Reset"))
    {
        Reset.boolValue = true;
    }

    EditorGUILayout.EndHorizontal ();

    EditorGUILayout.Space();

// GUI.Label(new Rect(0, 40, 100, 40), GUI.tooltip);
EditorGUILayout.LabelField(“FinalText:”);
EditorGUILayout.LabelField(“note: ‘\n’ for new line”);
EditorGUILayout.PropertyField(finalText, GUIContent.none,GUILayout.Height(50));

    EditorGUILayout.Space();

    EditorGUILayout.BeginHorizontal ();

    TM = (TimeModes) EditorGUILayout.EnumPopup(TM);

    if (TM == TimeModes.TotalTime)
    {
        Time = EditorGUILayout.Slider(Time,0f, 10f);
        TotalTypeTime.floatValue = Time;
    }
    else
    {
        Time = EditorGUILayout.Slider(Time,0f, 1f);
        TotalTypeTime.floatValue = -1f;
        TypeRate.floatValue = Time;
    }
    EditorGUILayout.EndHorizontal ();

    EditorGUILayout.Space();

    EditorGUILayout.LabelField("Random Character Change Rate");

    RCCR = EditorGUILayout.Slider(RCCR,0f, 1f);
    RandomCharacterChangeRate.floatValue = RCCR;

    TOS.ApplyModifiedProperties();

}

private string ParseNewline(string s)
{
    s = s.Replace("\\n","|");
   
    string[] SS = s.Split('|');
   
    string ReturnString = "";
   
    foreach (string rp in SS)
    {
        ReturnString = ReturnString + rp + "\n";
    }
   
    return ReturnString;
}

}**
```

2649716–186684–TerrainToolkitEditor.cs (55.1 KB)

2

You should be smarter. the answer is inside your question:

The type or namespace name `UnityEditorInternal’ could not be found. Are you missing a using directive or an assembly reference?

You should be aware that this assembly is not present when building players. You should properly #if UNITY_EDITOR any code that is using an editor API.