Object reference not set to an instance of an object.

at Epicor.Web.Models.ViewModels.FilteredPage20ViewModelFactory.GetFilteredModuleViewModels(List`1 pages, FilteredPage20 filteredPage20) in D:\a\1\s\Epicor.Web\Models\ViewModels\FilteredPage20ViewModelFactory.cs:line 259 at Epicor.Web.Models.ViewModels.FilteredPage20ViewModelFactory.BuildModel(FilteredPage20 currentPage, Int32 pagingPage) in D:\a\1\s\Epicor.Web\Models\ViewModels\FilteredPage20ViewModelFactory.cs:line 155 at Epicor.Web.Controllers.FilteredPage20Controller.<Index>d__7.MoveNext() in D:\a\1\s\Epicor.Web\Controllers\FilteredPage20Controller.cs:line 46