I've had difficulty with the file manager across many upgrades, and the solution of adding a try/catch modification to filemanager.ascx.cs always did the trick, but no longer. I'm at DNN 7.1.2 and getting the following error when I try to load the file manager:

Error: File Management is currently unavailable. DotNetNuke.Services.Exceptions.ModuleLoadException: The given key was not present in the dictionary. ---> System.Collections.Generic.KeyNotFoundException: The given key was not present in the dictionary. at System.Collections.Generic.Dictionary`2.get_Item(TKey key) at DotNetNuke.Modules.DigitalAssets.View.OnItemDataBoundFolderTypeComboBox(Object sender, RadComboBoxItemEventArgs e) at Telerik.Web.UI.RadComboBox.RaiseEvent(Object eventKey, RadComboBoxItemEventArgs e) at Telerik.Web.UI.RadComboBox.OnItemDataBound(RadComboBoxItemEventArgs e) at Telerik.Web.UI.RadComboBox.RaiseItemDataBound(ControlItem item) at Telerik.Web.UI.ControlItemContainer.Telerik.Web.UI.IItemContainer.RaiseItemDataBound(IItem item) at Telerik.Web.UI.ControlDataBinder.BindToEnumerableData(IEnumerable dataSource) at Telerik.Web.UI.ControlItemContainer.PerformDataBinding(IEnumerable data) at Telerik.Web.UI.RadComboBox.PerformDataBinding(IEnumerable dataSource) at Telerik.Web.UI.RadComboBox.OnDataSourceViewSelectCallback(IEnumerable data) at System.Web.UI.DataSourceView.Select(DataSourceSelectArguments arguments, DataSourceViewSelectCallback callback) at Telerik.Web.UI.RadComboBox.OnDataBinding(EventArgs e) at Telerik.Web.UI.RadComboBox.PerformSelect() at System.Web.UI.WebControls.BaseDataBoundControl.DataBind() at Telerik.Web.UI.RadComboBox.DataBind() at DotNetNuke.Modules.DigitalAssets.View.InitializeFolderType() at DotNetNuke.Modules.DigitalAssets.View.OnLoad(EventArgs e) --- End of inner exception stack trace ---

I've been hunting high and low here and cannot find a solution - hoping someone has it!

Thanks,

Ken