When accessing the K2 Designer and Workspace sites, a HTTP Error 402.2 - Unauthorized appears
kbt153919
PRODUCTIssue
When accessing the K2 Designer and Workspace sites from the browser, the following error appears:
"HTTP Error 401.2 Unauthorized: You are not authorized to view this page due to invalid authentication headers."
Symptoms
When opening IIS manager > Sites > K2 site > Workspace/Designer App > Authentication, Windows Authentication is missing.
Troubleshooting Steps
To resolve the issue, ensure that the 'Windows Authentication' role service is installed on the server and then, enable Windows authentication for the site or application.
Please see this Microsoft article for more information on how to verify/install this service.