An anonymous request was received in between authentication handshake requests
I was receiving this error while hosting a webapi project on .net 5, using kestrel.
fail: Microsoft.AspNetCore.Authentication.Negotiate.NegotiateHandler[5]
An exception occurred while processing the authentication request.
System.InvalidOperationException: An anonymous request was received in between authentication handshake requests.
at Microsoft.AspNetCore.Authentication.Negotiate.NegotiateHandler.HandleRequestAsync()
fail: Microsoft.AspNetCore.Server.Kestrel[13]
Connection id "0HM6A34N67LO5", Request id "0HM6A34N67LO5:00000005": An unhandled exception was thrown by the application.
System.InvalidOperationException: An anonymous request was received in between authentication handshake requests.
at Microsoft.AspNetCore.Authentication.Negotiate.NegotiateHandler.HandleRequestAsync()
at Microsoft.AspNetCore.Authentication.Negotiate.NegotiateHandler.HandleRequestAsync()
at Microsoft.AspNetCore.Authentication.AuthenticationMiddleware.Invoke(HttpContext context)
at Swashbuckle.AspNetCore.SwaggerUI.SwaggerUIMiddleware.Invoke(HttpContext httpContext)
at Swashbuckle.AspNetCore.Swagger.SwaggerMiddleware.Invoke(HttpContext httpContext, ISwaggerProvider swaggerProvider)
at Microsoft.AspNetCore.Server.Kestrel.Core.Internal.Http.HttpProtocol.ProcessRequests[TContext](IHttpApplication`1 application)