Symptoms

I would like to look at the K2 out-of-the-box (OOTB) reports. When logging into the K2 workspace and clicking on "Reports", a list of the OOTB reports appears. When clicking on any of them, the report quickly is visible and then the screen is blank. 
 

Resolution 

If using IE10/IE11, please add the K2 Workspace site to the 'Compatibility View Settings' as per documentations below and retesting:

http://help.k2.com/kb001327
http://help.k2.com/kb001578