Owin "The handle is invalid" error on startup

2.0.0.5163 Win64
Let me know if you need anything else.
Sonarr seems to run fine tho.

SignalR exception thrown by Task: System.AggregateException: One or more errors occurred. ---> System.IO.IOException ---> System.Net.HttpListenerException: The handle is invalid
   at System.Net.HttpResponseStream.Write(Byte[] buffer, Int32 offset, Int32 size)
   at Microsoft.Owin.Host.HttpListener.RequestProcessing.ExceptionFilterStream.Write(Byte[] buffer, Int32 offset, Int32 count)
   --- End of inner exception stack trace ---
   at Microsoft.Owin.Host.HttpListener.RequestProcessing.ExceptionFilterStream.Write(Byte[] buffer, Int32 offset, Int32 count)
   at Microsoft.AspNet.SignalR.Owin.ServerResponse.Write(ArraySegment`1 data) in M:\BuildAgent\work\b69c1fe19bfc2c38\src\Microsoft.AspNet.SignalR.Owin\ServerResponse.cs:line 50
   at Microsoft.AspNet.SignalR.Infrastructure.BinaryTextWriter.<>c.<.ctor>b__0_0(ArraySegment`1 data, Object state) in M:\BuildAgent\work\b69c1fe19bfc2c38\src\Microsoft.AspNet.SignalR.Core\Infrastructure\BinaryTextWriter.cs:line 12
   at Microsoft.AspNet.SignalR.Infrastructure.BufferTextWriter.ChunkedWriter.Flush(Byte[] byteBuffer, Boolean flushEncoder) in M:\BuildAgent\work\b69c1fe19bfc2c38\src\Microsoft.AspNet.SignalR.Core\Infrastructure\BufferTextWriter.cs:line 182
   at Microsoft.AspNet.SignalR.Infrastructure.BufferTextWriter.ChunkedWriter.Flush(Boolean flushEncoder) in M:\BuildAgent\work\b69c1fe19bfc2c38\src\Microsoft.AspNet.SignalR.Core\Infrastructure\BufferTextWriter.cs:line 163
   at Microsoft.AspNet.SignalR.Infrastructure.BufferTextWriter.Flush() in M:\BuildAgent\work\b69c1fe19bfc2c38\src\Microsoft.AspNet.SignalR.Core\Infrastructure\BufferTextWriter.cs:line 84
   at Microsoft.AspNet.SignalR.Transports.LongPollingTransport.PerformSend(Object state) in M:\BuildAgent\work\b69c1fe19bfc2c38\src\Microsoft.AspNet.SignalR.Core\Transports\LongPollingTransport.cs:line 322
   at Microsoft.AspNet.SignalR.Transports.LongPollingTransport.<>c.<Send>b__43_0(Object state) in M:\BuildAgent\work\b69c1fe19bfc2c38\src\Microsoft.AspNet.SignalR.Core\Transports\LongPollingTransport.cs:line 157
   at Microsoft.AspNet.SignalR.Infrastructure.TaskQueue.<Enqueue>b__14_0(Func`2 next, Object nextState) in M:\BuildAgent\work\b69c1fe19bfc2c38\src\Microsoft.AspNet.SignalR.Core\Infrastructure\TaskQueue.cs:line 85
   at Microsoft.AspNet.SignalR.TaskAsyncHelper.FromMethod[T1,T2](Func`3 func, T1 arg1, T2 arg2) in M:\BuildAgent\work\b69c1fe19bfc2c38\src\Microsoft.AspNet.SignalR.Core\TaskAsyncHelper.cs:line 764
   --- End of inner exception stack trace ---
---> (Inner Exception #0) System.IO.IOException ---> System.Net.HttpListenerException: The handle is invalid
   at System.Net.HttpResponseStream.Write(Byte[] buffer, Int32 offset, Int32 size)
   at Microsoft.Owin.Host.HttpListener.RequestProcessing.ExceptionFilterStream.Write(Byte[] buffer, Int32 offset, Int32 count)
   --- End of inner exception stack trace ---
   at Microsoft.Owin.Host.HttpListener.RequestProcessing.ExceptionFilterStream.Write(Byte[] buffer, Int32 offset, Int32 count)
   at Microsoft.AspNet.SignalR.Owin.ServerResponse.Write(ArraySegment`1 data) in M:\BuildAgent\work\b69c1fe19bfc2c38\src\Microsoft.AspNet.SignalR.Owin\ServerResponse.cs:line 50
   at Microsoft.AspNet.SignalR.Infrastructure.BinaryTextWriter.<>c.<.ctor>b__0_0(ArraySegment`1 data, Object state) in M:\BuildAgent\work\b69c1fe19bfc2c38\src\Microsoft.AspNet.SignalR.Core\Infrastructure\BinaryTextWriter.cs:line 12
   at Microsoft.AspNet.SignalR.Infrastructure.BufferTextWriter.ChunkedWriter.Flush(Byte[] byteBuffer, Boolean flushEncoder) in M:\BuildAgent\work\b69c1fe19bfc2c38\src\Microsoft.AspNet.SignalR.Core\Infrastructure\BufferTextWriter.cs:line 182
   at Microsoft.AspNet.SignalR.Infrastructure.BufferTextWriter.ChunkedWriter.Flush(Boolean flushEncoder) in M:\BuildAgent\work\b69c1fe19bfc2c38\src\Microsoft.AspNet.SignalR.Core\Infrastructure\BufferTextWriter.cs:line 163
   at Microsoft.AspNet.SignalR.Infrastructure.BufferTextWriter.Flush() in M:\BuildAgent\work\b69c1fe19bfc2c38\src\Microsoft.AspNet.SignalR.Core\Infrastructure\BufferTextWriter.cs:line 84
   at Microsoft.AspNet.SignalR.Transports.LongPollingTransport.PerformSend(Object state) in M:\BuildAgent\work\b69c1fe19bfc2c38\src\Microsoft.AspNet.SignalR.Core\Transports\LongPollingTransport.cs:line 322
   at Microsoft.AspNet.SignalR.Transports.LongPollingTransport.<>c.<Send>b__43_0(Object state) in M:\BuildAgent\work\b69c1fe19bfc2c38\src\Microsoft.AspNet.SignalR.Core\Transports\LongPollingTransport.cs:line 157
   at Microsoft.AspNet.SignalR.Infrastructure.TaskQueue.<Enqueue>b__14_0(Func`2 next, Object nextState) in M:\BuildAgent\work\b69c1fe19bfc2c38\src\Microsoft.AspNet.SignalR.Core\Infrastructure\TaskQueue.cs:line 85
   at Microsoft.AspNet.SignalR.TaskAsyncHelper.FromMethod[T1,T2](Func`3 func, T1 arg1, T2 arg2) in M:\BuildAgent\work\b69c1fe19bfc2c38\src\Microsoft.AspNet.SignalR.Core\TaskAsyncHelper.cs:line 764<---

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