Regression:- View History Document Sub Type first option " ---Select Document Sub Type--- " when selected and clicked on search button Server Error is displayed.

Steps:-
1] Log into the system using valid credentials.
2] Search and select company.
3] Search and select employee.
4] Click on View History option from Employee left menu.
5] Select Document Sub Type as " Select Document Sub Type " and click on search button and observe.

Actual Result:-
Server Error is displayed if we select Document Sub Type as " Select Document Sub Type "and click on search button

Expected Result:-
This first option named should be changed to All Document Sub Types and also should consider all document sub types when clicked on search button.