Uploading nuget package throws exception

After we upgraded to 3.2.15, when we try to push our nuget packages to the built-in repo, it suddenly fails with the following error (under diagnostics).

Unhandled exception from web server: The file exists.

System.IO.IOException: The file exists.

at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
at System.IO.Path.InternalGetTempFileName(Boolean checkHost)
at Nancy.IO.RequestStream.MoveStreamContentsToFileStream()
at Nancy.IO.RequestStream.MoveStreamOutOfMemoryIfExpectedLengthExceedSwitchLength(Int64 expectedLength)
at Nancy.IO.RequestStream…ctor(Stream stream, Int64 expectedLength, Int64 thresholdLength, Boolean disableStreamSwitching)
at Octopus.Server.Web.OctopusNancyHost.ConvertRequestToNancyRequest(HttpListenerRequest request) in Y:\work\refs\tags\3.2.13\source\Octopus.Server\Web\OctopusNancyHost.cs:line 303
at Octopus.Server.Web.OctopusNancyHost.Process(HttpListenerContext ctx) in Y:\work\refs\tags\3.2.13\source\Octopus.Server\Web\OctopusNancyHost.cs:line 438

The error still happens after a downgrade to .13 (as you can see in the stack trace above)

Resolved the issue: using the stack trace i found this Stack Overflow post:

Indeed our temp folder had more than 65535 files, after clearing it everything worked again!