ESS: Leave Request: 500 Internal Server Error

Hi All,

When i click on ESS- leave request,

i get the following error: <b>500 Internal Server Error</b>

<i>The initial exception that caused the request to fail, was:

java.lang.NoSuchMethodError: com/sap/pcuigp/xssfpm/java/ApplicationContext.isExitButtonAllowed()Z</i>

The same error comes in other services also..

I dont know why this error is coming.. as all these services were working fine one week back..

Could any one pls help me in this regard ASAP..

Regards,

Mahesh.M.R