Leave Approver getting Error in ESS

Hi,

In ESS Portal the approver is not able to approve the user leave cancellation . If he press approval button he is getting the following error

`include(~service="system", ~language="", ~theme="dm", ~name="TemplateLibraryDHTML.html")` `SAP_TopInclude()` `SAP_PageTitle()` `SAP_Stylesheet()` `SAP_JavaScript()` `SAP_FormBegin()` `SAP_FormEnd()`

I am new to ESS and workflow..

Please, tell me what i can do ?

Regards,

Nandha