Internal Compiler Error

So my game runs the way it should in unity. But when i build it i get this error

Internal compiler error. See the console log for more information. output was: Unhandled Exception: System.UnauthorizedAccessException: Access to the path "C:\Users\Marshall\Documents\New Unity Project\Temp\Assembly-CSharp-firstpass.dll.mdb" is denied.

at System.IO.FileStream..ctor (System.String path, FileMode mode, FileAccess access, FileShare share, Int32 bufferSize, Boolean anonymous, FileOptions options) [0x00000] in :0

at System.IO.FileStream..ctor (System.String path, FileMode mode, FileAccess access, FileShare share, Int32 bufferSize, Boolean isAsync, Boolean anonymous) [0x00000] in :0

at System.IO.FileStream..ctor (System.String path, FileMode mode, FileAccess access) [0x00000] in :0

at Mono.CompilerServices.SymbolWriter.MonoSymbolWriter.WriteSymbolFile (Guid guid) [0x00000] in :0

at Mono.CSharp.SymbolWriter+SymbolWriterImpl.WriteSymbolFile () [0x00000] in :0

at Mono.CSharp.SymbolWriter.WriteSymbolFile () [0x00000] in :0

at Mono.CSharp.CodeGen.Save (System.String name, Boolean saveDebugInfo, Mono.CSharp.Report Report) [0x00000] in :0

at Mono.CSharp.Driver.Compile () [0x00000] in :0

at Mono.CSharp.Driver.Main (System.String[] args) [0x00000] in :0

Im guessing it had something to do with unity compiling the scripts but i have no idea how to fix it. This is the script that might be causing the problem

 using UnityEngine;
 using System.Collections;
 
 public class NetworkManager : MonoBehaviour 
 {
     public Camera standbyCamera;
     spawnSpot[] spawnSpots;
 
     void Start () 
     {
         connect();
         spawnSpots = GameObject.FindObjectsOfType<spawnSpot>();
     }
     
     void connect()
     {
         PhotonNetwork.ConnectUsingSettings("poop v1.0.0");
 
     }
     
     void OnGUI()
     {
         GUILayout.Label( PhotonNetwork.connectionStateDetailed.ToString() );
     }
     
     void OnJoinedLobby()
     {
         PhotonNetwork.JoinRandomRoom();
     }
 
     void OnPhotonRandomJoinFailed()
     {
         Debug.Log ("Failed to Join a Room");
         PhotonNetwork.CreateRoom (null);
     }
 
     void OnJoinedRoom()
     {
         Debug.Log ("Successfully Joied Room");
         spawnMyPlayer();
     }
      
     //section that is most likely causing the problem
     void spawnMyPlayer()
     {
         if(spawnSpots == null)
         {
             Debug.LogError ("WTF?!?!?!");
         }  
         spawnSpot mySpawnSpot = spawnSpots [Random.Range (0, spawnSpots.Length)];
         GameObject myPlayerGO = (GameObject)PhotonNetwork.Instantiate ("PlayerController", mySpawnSpot.transform.position, mySpawnSpot.transform.rotation, 0);
 
         standbyCamera.enabled = false;
         ((MonoBehaviour)myPlayerGO.GetComponent("FPSInputController")).enabled = true;
         myPlayerGO.GetComponent<MouseLook> ().enabled = true;
     }
 }

when i say might be causing the problem I mean that is my best guess