NO URL IS SET - error in jqGrid (Add, Edit dialog)

Hi Folks 
 
This issue generally appears when you don't set a respective URL for Add/Delete/Edit in jqGrid as shown below //editurl: '/Admin/EditTopics/'
And you preforming any action whether add delete or Edit. whenever you click on any respective submit button and there is no url is defined than it prompts you such error.
 
I have encountered this error during integration of jqgrid in MVC.