'Object reference not set to an instance of an object' Error when trying to move contents from view page to another - asp.net-mvc

Question

I have a button in my Index.html page which shows another view page: Reports.cshtml, there is a table inside the page, now I want to remove this button and let the table showing on my Index.html page directly, but when I paste the table to the code it shows an error:
Error
Part of my view code are showed below:
<table id="hardware-data-table" class="table table-striped table-hover">
<thead bgcolor="silver">
<tr>
<th hidden="hidden">
#Html.LabelFor(model => model.Report_HardwareListByExpiration.FirstOrDefault().InvHardwareID)
</th>
<th>
#Html.LabelFor(model => model.Report_HardwareListByExpiration.FirstOrDefault().Equipment)
</th>
<th>
#Html.LabelFor(model => model.Report_HardwareListByExpiration.FirstOrDefault().HardwareModel)
</th>
<th>
#Html.LabelFor(model => model.Report_HardwareListByExpiration.FirstOrDefault().WL_EndDateFormatted)
</th>
</tr>
</thead>
<tbody>
#foreach (var item in Model.Report_HardwareListByExpiration)
{
if (item.WL_EndDate < DateTime.Now && item.WL_EndDate > DateTime.Now.AddYears(-99))
{
<tr>
<td hidden="hidden">
#item.InvHardwareID
</td>
<td>
#item.Equipment
</td>
<td>
#item.HardwareModel
</td>
<td style="background-color: #ff726f">#item.WL_EndDateFormatted</td>
</tr>
}
if (item.WL_EndDate > DateTime.Now && item.WL_EndDate < DateTime.Now.AddYears(99))
{
<tr>
<td hidden="hidden">
#item.InvHardwareID
</td>
<td>
#item.Equipment
</td>
<td>
#item.HardwareModel
</td>
<td style="background-color: orange">
#item.WL_EndDateFormatted
</td>
</tr>
}
}
</tbody>
</table>
My Report controller code are showed below:
public class ReportsController : Controller
{
// GET: Report
public ActionResult Reports()
{
if (Session["UserID"] == null || !(bool)Session["IsLoggedIn"])
{
return RedirectToAction("Login", "Account");
}
ViewModel myViewModel = new ViewModel
{
User = GetSessionInfoFromSessions(),
Params = new ParametersModel
{
Start_Date = new DateTime(2015, 12, 31),
End_Date = DateTime.Now.AddDays(60)
}
};
myViewModel.Report_HardwareListByExpiration = InvHardwareModel.Report_HardwareListByExpiration(myViewModel);
return View(myViewModel);
}
And my hardware Model:
public static List<InvHardwareModel> Report_HardwareListByExpiration(ViewModel myViewModel)
{
try
{
var myAssManEnt = new AssetManagementEntities();
var myUspList = myAssManEnt.usp_Report_InvHardware_ByExpirationDates
(
agencyID : myViewModel.User.AgencyID,
deptID : myViewModel.User.DeptID,
roleID : myViewModel.User.RoleID,
startDate : myViewModel.Params.Start_Date,
endDate : myViewModel.Params.End_Date
).ToList();
var myReturnList = new List<InvHardwareModel>();
foreach(usp_Report_InvHardware_ByExpirationDates_Result myItem in myUspList)
{
myReturnList.Add(Models.InvHardwareModel.ToModel(myItem));
}
return myReturnList;
}
catch(Exception e)
{
throw ErrorHandler.MyException(e, "InvHardwareModel.Report_HardwareListByExpiration");
}
}
The code works perfect when its in the other view page, but shows exception when I move it to my home page, any ideas? Thank you so much!