MVC3 asp.net错误：值不能为null。参数名称：下拉列表中的项目

I am getting a dump ONLY in the server and not in my local system when trying to post the data. There is a page which submits some value to the database. I have also modeled the dropdown in the page as mandatory. However, when clicking on "Create", instead of giving an error like "Missing"; it throws a dump. I am getting a dump ONLY in the server and not