Project contains compiler errors

Hi, since 2 days ago whenever I open one of my Unity projects I'm getting an error while loading editor saying my project has got compiler errors and suggesting me to enter safe mode; afterwards, once in the editor I get an error message in the console saying

Init must be called first.

I want to know the reason because this is happening, hence I will comment the possible critical changes I had done the previous day to the first time getting this error:

• Updated Unity Hub to it's newer beta version 3.0.0

• Created an editor script for adding a button to Animator to automatically generate a class with animation parameters names as constants (class down here)

  ---

  using UnityEngine; using UnityEditor; using System.IO; using System.Linq;

  [CustomEditor(typeof(Animator))] public class AnimatorExtensionsEditor : Editor { private Animator animator;

     public override void OnInspectorGUI()
       {
           DrawDefaultInspector();
           EditorGUILayout.Space();
   
           GUILayout.Label("Animation Extras:");
   
           if (GUILayout.Button($"Generate {Selection.activeGameObject.name} animator c# class"))
           {
               animator = Selection.activeGameObject.GetComponent<Animator>();
               GenerateAnimatorClass(Selection.activeGameObject.name + "AnimatorParameters", animator.parameters.Select(p => p.name.Replace(' ', '_').ToUpper()).ToArray(), animator.parameters.Select(p => p.name).ToArray());
               GUIUtility.ExitGUI();
           }
       }
   
       private void GenerateAnimatorClass(string className, string[] constantsNames, string[] constantsValues)
       {
           string path = EditorUtility.SaveFilePanel($"Generate animator class for {Selection.activeGameObject.name}", string.Empty, $"{className}.cs", ".cs");
   
           if (path == string.Empty) return;
   
           string classDeclaration = $"public static class {className}";
           string[] fields = new string[constantsNames.Length];
           string finalClass = classDeclaration + '\n' + '{' + '\n';
   
           for (int i = 0; i < fields.Length; i++)
           {
               fields[i] = ConstDeclaration(constantsNames[i], constantsValues[i]);
               finalClass += '\t' + fields[i] + '\n';
           }
   
           finalClass += '}';
   
           File.WriteAllText(path, finalClass);
   
           AssetDatabase.Refresh();
   
           const char apostrophe = '"';
           static string ConstDeclaration(string constName, string constValue) => $"public const string {constName} = {apostrophe}{constValue}{apostrophe};";
       }
   }