This article was created in response to a support issue logged with K2. The content may include typographical errors and may be revised at any time without notice This article is not considered official documentation for K2 software and is provided "as is" with no warranties.

Issue

The following error isappears when creating a workflow in K2 Designer:

500 Internal Server Error: Primary Credentials Not Authenticated. Session Not Authenticated.

Sample error message screenshot:

500 Internal Server Error: Primary Credentials Not Authenticated. Session Not Authenticated.

The error might clear by itself but it reoccurs each time a workflow is created or edited.

Symptoms

This error can be caused by enabled ASP.NET Impersonation Authentication for Autodiscover under the K2 site.

ASP.NET Impersonation Authentication for Autodiscover under K2 site

Troubleshooting Steps

Disabling ASP.NET Impersonation Authentication for Autodiscover under the K2 site will resolve the issue.