Whenever I navigate to Project Center in Project Server 2013 the credentials window pops-up continuously even after entering correct admin account and after several clicks on Ok button in credential window it says,

"An unknown error has occurred"

This is happening at every links even at Resources, Tasks, Reports,etc. Is this Project Server 2013 stable or still has bugs in it ?

I recently installed March 2013 hotfix for Project Server but still no luck. In ULS or Event Viewer I didn't got any relevant exceptions.

I am even unable to connect to Project Server from Project Professional.

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In my case Anonymous authentication was disabled for the Project Server web application on IIS level. It must be enabled for SharePoint web applications with claims authentication configured.

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pls review this blog hope it solve your issue http://blogs.msdn.com/b/brismith/archive/2010/07/02/project-server-2010-an-unknown-error-has-occurred-in-project-center-resource-center-or-tasks.aspx

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  • While this may theoretically answer the question, we prefer inclusion of the essential parts of the answer here, and to provide the link for reference. See answer for general guidelines. – SPDoctor Sep 13 '13 at 17:35
  • Please read the question first then post your answer, the answer is for 2010, his question is for 2013 you know there are allot of changes. – MJVM Apr 7 '15 at 10:26

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