Thanks for the method you provided. I need to join Open API now, I encountered this error, what is the reason? I have another project that has Swagger api on behalf of it. I now add it to the url according to the documentation, and an error is reported. Why is this?

Checking project for required NuGet packges...
Installing NuGet packages to project...
Installing package 'NSwag.ApiDescription.Client' with version '13.0.5'.
ErrorNuGet.Protocol.Core.Types.FatalProtocolException: The feed 'nuget.org [https://api.nuget.org/v3/index.json]' lists package 'NSwag.MSBuild.13.0.5' but multiple attempts to download the nupkg have failed. The feed is either invalid or required packages were removed while the current operation was in progress. Verify the package exists on the feed and try again. ---> NuGet.Protocol.PackageNotFoundProtocolException: Unable to find package 'NSwag.MSBuild.13.0.5'.
   at NuGet.Protocol.FindPackagesByIdNupkgDownloader.<GetNuspecReaderFromNupkgAsync>d__6.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at NuGet.Protocol.HttpFileSystemBasedFindPackageByIdResource.<GetDependencyInfoAsync>d__9.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at NuGet.Commands.SourceRepositoryDependencyProvider.<GetDependenciesCoreAsync>d__22.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at NuGet.Commands.SourceRepositoryDependencyProvider.<>c__DisplayClass21_0.<<GetDependenciesAsync>b__0>d.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)