Unable to Display CI Relationship Graph :: Both in IE & Chrome

Hello Experts,

In our environment, CI Relationship graph is not opening up.  It is showing ClassNotFoundException (com.hp.ov.dv.yfiles.ViewerY.class) application Error.

I have attached the screenshot, just for reference.  Not really getting any clue.

What I got to know is yfiles for Java provides essential building blocks for writing Java applications that analyze, visualize, edit, or automatically draw graphs, diagrams, or networks. So, If we need diagramming components, we need yFiles! And I am wondering how to get rid of this error message.

Please give your valuable inputs regarding the same.