Getting exception message while approving leave request in Approve leave requests (Version 2)

Hi Experts,

Getting exception message while approving leave request in Approve leave requests (Version 2) & Available balance is also showing wrong as it is showing total leaves rather it should show Available balance= Total leaves-consumed leave. I mean Available balance is different to entitlement. In below mentioned screen-shot, Available balance 26 while it should be 24 actually 26 is total leave.

There is no error in /iwfnd/error_log or no dump in ST22.

Regards,

Shakti