Error when building: "UnauthorizedAccessException: Access to the path 'LICENSE' is denied".

My Unity project was building just fine until yesterday evening.
This morning, without having done any changes to the project, I get the error mentioned in the title when trying to build. I have not done any changes to the filesystem (i.e. changed permissions or anything of the like). I also didn't install any new software. Basically, I didn't do anything of significance (that I know of) that would cause this error today, when yesterday evening I wasn't getting this error and building was working fine.

I am getting this on Windows 11 and Unity 2021.3.3f1.180

Here's the full output of the error:

I am using a custom build pipeline, which basically does a "normal" build plus some postprocessing scripts. However, I also get this error when I use the normal Unity Build (i.e. through File -> Build Settings -> Build) The custom build pipeline looks as follows, and the last code that executes in this file is

UnityEngine.Debug.Log("Build failed");

in line 57:

Code (CSharp):

1.  
2.  
3. using System.Collections;
4. using System.Collections.Generic;
5. using UnityEngine;
6. using UnityEditor;
7. using UnityEditor.Build.Reporting;
8. using System.IO;
9. using System.IO.Compression;
10. using System.Diagnostics;
11. using System;
12.  
13. public class CustomBuildMenu
14. {
15.     public string password;
16.     [MenuItem("File/Run Custom Build", false, 211)]
17.     static void RunCustomBuild()
18.     {
19.         bool bPingSuccess = false;
20.         Stopwatch stopWatch = new Stopwatch();
21.         stopWatch.Start();
22.         var ping = new Ping("192.168.101.129");
23.         while (!(ping.isDone || stopWatch.Elapsed > TimeSpan.FromSeconds(10)))
24.         {
25.             bPingSuccess = ping.isDone;
26.         }
27.         ping.DestroyPing();
28.         stopWatch.Stop();
29.         UnityEngine.Debug.Log(string.Format("Ping completed with success: {0}", bPingSuccess));
30.  
31.         if (!bPingSuccess)
32.         {
33.             UnityEngine.Debug.Log("Aborting build. Could not ping remote mac. Is it running?");
34.             return;
35.         }
36.         UnityEngine.Debug.Log("Ping to remote mac successful. Continuing build...");
37.  
38.         string password = EditorInputDialog.Show("Password", "Enter password for remote mac", "");
39.         if (string.IsNullOrEmpty(password) || string.IsNullOrWhiteSpace(password))
40.         {
41.             return;
42.         }
43.  
44.         BuildPlayerOptions buildPlayerOptions = GetCurrentBuildOptions();
45.  
46.         BuildReport report = BuildPipeline.BuildPlayer(buildPlayerOptions);
47.         BuildSummary summary = report.summary;
48.  
49.         if (summary.result == BuildResult.Succeeded)
50.         {
51.             UnityEngine.Debug.Log("Build succeeded: " + summary.totalSize + " bytes");
52.             PostProcess(report, password);
53.         }
54.  
55.         if (summary.result == BuildResult.Failed)
56.         {
57.             UnityEngine.Debug.Log("Build failed");
58.         }
59.     }
60.  
61.     static BuildPlayerOptions GetCurrentBuildOptions(BuildPlayerOptions defaultOptions = new BuildPlayerOptions())
62.     {
63.         return BuildPlayerWindow.DefaultBuildMethods.GetBuildPlayerOptions(defaultOptions);
64.     }
65.  
66.     static void PostProcess(BuildReport report, string password)
67.     {
68.         string sPath = @"C:\Users\chris\builds\game\ios\";
69.         string sFile = @"C:\Users\chris\builds\game\iosBuild.zip";
70.         if (File.Exists(sFile))
71.         {
72.             File.Delete(sFile);
73.         }
74.  
75.  
76.  
77.         ZipFile.CreateFromDirectory(sPath, sFile); // something here is not working. Read docs for debug
78.  
79.         RunFile(@"C:\Users\chris\source\repos\game\PrePostBuildShellScripts", "@publishToMac.bat", password);
80.  
81.     }
82.     static int RunFile(string directory, string file, string password)
83.     {
84.         int exitCode = -1;
85.         try
86.         {
87.             ProcessStartInfo processInfo;
88.             Process process;
89.  
90.             processInfo = new ProcessStartInfo();
91.             processInfo.WorkingDirectory = directory;
92.             processInfo.FileName = file;
93.             processInfo.CreateNoWindow = false;
94.             processInfo.UseShellExecute = true;
95.             processInfo.Arguments = password;
96.  
97.             process = Process.Start(processInfo);
98.             process.WaitForExit();
99.             exitCode = process.ExitCode;
100.             process.Close();
101.         }
102.         catch (Exception e)
103.         {
104.             UnityEngine.Debug.Log(e.Message);
105.         }
106.         return exitCode;
107.     }
108.  
109. }
110.  

 

I am still getting this error

 

For now, I seem to have fixed it. If anyone else comes across this error, what worked for me was deleting the folder to which I build, so that Unity doesn't ask whether it should append to it or replace it. I hope this keeps working. Seems like a bug to me though?