SceneManager.LoadScene causes total freeze

So my game has a main menu scene (scene 0) and an ingame scene (scene 1). When i try to load scene 0 from 1 it freezes forever and a memory leak occurs. I've tried async and that didnt work either and ive tried to make sure every value and etc is valid.

I thank you in advance for any help.

One thing to note about the script is that the Debug.Log("MainMenu input"); doesnt even show in Console. The script:

 public class LevelController : MonoBehaviour
 {
     [SerializeField]
     private Transform[] playerSpawns;
     [SerializeField]
     private GameObject playerPrefab;
     [SerializeField]
     private GameObject winScreen;
     [SerializeField]
     private TextMeshProUGUI winText;
 
     private PlayerConfiguration[] playerConfigs;
     private List<int> deadPlayers = new List<int>();
 
     public bool gameOver;
 
     void Start()
     {
         playerConfigs = PlayerConfigurationManager.Instance.GetPlayerConfigs().ToArray();
         for (int i = 0; i < playerConfigs.Length; i++)
         {
             playerConfigs[i].PlayerObj = Instantiate(playerPrefab, playerSpawns[i].position, playerSpawns[i].rotation, gameObject.transform);
             playerConfigs[i].SetAlive(true);
             playerConfigs[i].Input.enabled = true;
             playerConfigs[i].PlayerObj.GetComponent<Renderer>().material = playerConfigs[i].playerMaterial;
             playerConfigs[i].PlayerObj.GetComponent<PlayerInputHandler>().InitPlayer(playerConfigs[i]);
         }
         gameOver = false;
         Debug.Log("Number of players: " + playerConfigs.Length);
     }
 
     void Update()
     {
         if (!gameOver)
         {
             for (int i = 0; i < playerConfigs.Length; i++)
             {
                 // Handles DeathCheck and stuff.
                 if (playerConfigs[i].isAlive())
                 {
                     if (playerConfigs[i].PlayerObj.transform.position.y < -10f)
                     {
                         playerConfigs[i].isAlive();
                         deadPlayers.Add(i);
                         playerConfigs[i].Input.enabled = false;
                         Destroy(playerConfigs[i].PlayerObj.GetComponent<Mover>().arrow);
                         Destroy(playerConfigs[i].PlayerObj);
                     }
                 }
                 if (deadPlayers.Count == (playerConfigs.Length - 1))
                 {
                     for (int e = 0; e < playerConfigs.Length; e++)
                     {
                         if (!deadPlayers.Contains(e))
                         {
                             Debug.Log(playerConfigs[i].PlayerIndex.ToString() + " has won!");
                             gameOver = true;
                             SetWinner(e);
                         }
                     }
 
                 }
             }
         }
 
     }
 
     private void SetWinner(int i)
     {
         var img = winScreen.GetComponentInChildren<UnityEngine.UI.Image>();
         img.color = playerConfigs[i].playerMaterial.color;
         winText.SetText("Player " + (i + 1).ToString() + " has won!");
         winScreen.SetActive(true);
         // ###########################################
         // FIX THIS LATER ############################
         //############################################
         // derps out when restarting level
         playerConfigs[i].Input.onActionTriggered += Input_onActionTriggered;
         Debug.Log("Player " + i + " input actions added");
     }
 
     private void Input_onActionTriggered(CallbackContext obj)
     {
         if (obj.action.name == "MainMenu")
         {
             Debug.Log("MainMenu input");
             if (GameObject.Find("LevelInitializer").GetComponent<LevelController>().gameOver)
             {
                 GoToMainMenu();
             }
         }
         else if (obj.action.name == "Restart")
         {
             Debug.Log("Restart input");
             if (GameObject.Find("LevelInitializer").GetComponent<LevelController>().gameOver)
             {
                 PlayAgain();
             }
         }
     }
 
     private void PlayAgain()
     {
         for (int i = 0; i < playerConfigs.Length; i++)
         {
 
         }
         Scene scene = SceneManager.GetActiveScene();
         SceneManager.LoadScene(scene.name, LoadSceneMode.Single);
     }
 
     private void GoToMainMenu()
     {
         Debug.Log("GoToMainMenu()");
         while (true) {
             GameObject g = GameObject.Find("PlayerConfigurationManager");
             if (g == null)
             {
                 break;
             }
             Destroy(g);
         }
 
         Debug.Log("loading Main Menu");
         SceneManager.LoadScene(0, LoadSceneMode.Single);
     }
 }