title: NuGet.Packaging.Core.PackagingException: Unable to find fallback package folder 'C:\Program Files (x86)\Progress\ToolboxNugetPackages'
body: <p>I'm getting this error on a new <em>Windows 10 Enterprise 2004</em> installation with the latest version of <em>Visual Studio 2019 Enterprise</em> installed. I am just trying to compile a stock .NET Core Console app; I get this error when I try to build the solution.</p>
  <pre><code>    Severity    Code    Description Project File    Line    Suppression State
      Error   MSB4018 The &quot;ResolvePackageAssets&quot; task failed unexpectedly.
      NuGet.Packaging.Core.PackagingException: Unable to find fallback package folder 'C:\Program Files 
      (x86)\Progress\ToolboxNugetPackages'.
         at NuGet.Packaging.FallbackPackagePathResolver..ctor(String userPackageFolder, IEnumerable`1 
      fallbackPackageFolders)
         at Microsoft.NET.Build.Tasks.NuGetPackageResolver.CreateResolver(IEnumerable`1 packageFolders)
         at Microsoft.NET.Build.Tasks.NuGetPackageResolver.CreateResolver(LockFile lockFile)
         at Microsoft.NET.Build.Tasks.ResolvePackageAssets.CacheWriter..ctor(ResolvePackageAssets task)
         at 
       Microsoft.NET.Build.Tasks.ResolvePackageAssets.CacheReader.CreateReaderFromDisk(ResolvePackageAssets 
      task, Byte[] settingsHash)
         at Microsoft.NET.Build.Tasks.ResolvePackageAssets.CacheReader..ctor(ResolvePackageAssets task)
         at Microsoft.NET.Build.Tasks.ResolvePackageAssets.ReadItemGroups()
         at Microsoft.NET.Build.Tasks.ResolvePackageAssets.ExecuteCore()
         at Microsoft.NET.Build.Tasks.TaskBase.Execute()
         at Microsoft.Build.BackEnd.TaskExecutionHost.Microsoft.Build.BackEnd.ITaskExecutionHost.Execute()
         at Microsoft.Build.BackEnd.TaskBuilder.&lt;ExecuteInstantiatedTask&gt;d__26.MoveNext() ConsoleApp1  
       C:\Program 
       
       Files\dotnet\sdk\3.1.301\Sdks\Microsoft.NET.Sdk\targets\Microsoft.PackageDependencyResolution.targets   
     234  
  </code></pre>