Its not working about xamarin.forms-cardview HOT 3 OPEN

Position 8:14. Type cardView:CardView not found in xmlns clr-namespace:CardView;assembly=CardView

  at Xamarin.Forms.Xaml.CreateValuesVisitor.Visit (Xamarin.Forms.Xaml.ElementNode node, Xamarin.Forms.Xaml.INode parentNode) [0x00040] in D:\agent_work\1\s\Xamarin.Forms.Xaml\CreateValuesVisitor.cs:48 
  at Xamarin.Forms.Xaml.ElementNode.Accept (Xamarin.Forms.Xaml.IXamlNodeVisitor visitor, Xamarin.Forms.Xaml.INode parentNode) [0x000ab] in D:\agent_work\1\s\Xamarin.Forms.Xaml\XamlNode.cs:149 
  at Xamarin.Forms.Xaml.ElementNode.Accept (Xamarin.Forms.Xaml.IXamlNodeVisitor visitor, Xamarin.Forms.Xaml.INode parentNode) [0x00078] in D:\agent_work\1\s\Xamarin.Forms.Xaml\XamlNode.cs:145 
  at Xamarin.Forms.Xaml.ElementNode.Accept (Xamarin.Forms.Xaml.IXamlNodeVisitor visitor, Xamarin.Forms.Xaml.INode parentNode) [0x00078] in D:\agent_work\1\s\Xamarin.Forms.Xaml\XamlNode.cs:145 
  at Xamarin.Forms.Xaml.RootNode.Accept (Xamarin.Forms.Xaml.IXamlNodeVisitor visitor, Xamarin.Forms.Xaml.INode parentNode) [0x00078] in D:\agent_work\1\s\Xamarin.Forms.Xaml\XamlNode.cs:203 
  at Xamarin.Forms.Xaml.XamlLoader.Visit (Xamarin.Forms.Xaml.RootNode rootnode, Xamarin.Forms.Xaml.HydrationContext visitorContext) [0x00054] in D:\agent_work\1\s\Xamarin.Forms.Xaml\XamlLoader.cs:138 
  at Xamarin.Forms.Xaml.XamlLoader.Load (System.Object view, System.String xaml) [0x0004b] in D:\agent_work\1\s\Xamarin.Forms.Xaml\XamlLoader.cs:89 
  at Xamarin.Forms.Xaml.XamlLoader.Load (System.Object view, System.Type callingType) [0x0002f] in D:\agent_work\1\s\Xamarin.Forms.Xaml\XamlLoader.cs:68 
  at Xamarin.Forms.Xaml.Extensions.LoadFromXaml[TXaml] (TXaml view, System.Type callingType) [0x00000] in D:\agent_work\1\s\Xamarin.Forms.Xaml\ViewExtensions.cs:36 
  at AwesomeApp.Views.SelectItemPage.InitializeComponent () [0x00001] in /Users/karl/Projects/AwesomeApp/AwesomeApp/obj/Debug/AwesomeApp.Views.SelectItemPage.xaml.g.cs:20 
  at AwesomeApp.Views.SelectItemPage..ctor () [0x00008] in /Users/karl/Projects/AwesomeApp/AwesomeApp/Views/SelectItemPage.xaml.cs:12 
  at AwesomeApp.Views.SettingsPage.OnRoutineTapped (System.Object sender, System.EventArgs e) [0x00001] in /Users/karl/Projects/AwesomeApp/AwesomeApp/Views/SettingsPage.xaml.cs:28 
  at Xamarin.Forms.Cell.OnTapped () [0x00008] in D:\agent_work\1\s\Xamarin.Forms.Core\Cells\Cell.cs:102 
  at Xamarin.Forms.TableView+TableSectionModel.OnRowSelected (System.Object item) [0x00007] in D:\agent_work\1\s\Xamarin.Forms.Core\TableView.cs:212 
  at Xamarin.Forms.Internals.TableModel.RowSelected (System.Object item) [0x0001a] in D:\agent_work\1\s\Xamarin.Forms.Core\TableModel.cs:68 
  at Xamarin.Forms.Internals.TableModel.RowSelected (System.Int32 section, System.Int32 row) [0x00000] in D:\agent_work\1\s\Xamarin.Forms.Core\TableModel.cs:60 
  at Xamarin.Forms.Platform.iOS.TableViewModelRenderer.RowSelected (UIKit.UITableView tableView, Foundation.NSIndexPath indexPath) [0x00017] in <bc5a3d4303744676b3b36f4254bb697d>:0 
  at (wrapper managed-to-native) UIKit.UIApplication.UIApplicationMain(int,string[],intptr,intptr)
  at UIKit.UIApplication.Main (System.String[] args, System.IntPtr principal, System.IntPtr delegate) [0x00005] in /Library/Frameworks/Xamarin.iOS.framework/Versions/11.9.1.24/src/Xamarin.iOS/UIKit/UIApplication.cs:79 
  at UIKit.UIApplication.Main (System.String[] args, System.String principalClassName, System.String delegateClassName) [0x00038] in /Library/Frameworks/Xamarin.iOS.framework/Versions/11.9.1.24/src/Xamarin.iOS/UIKit/UIApplication.cs:63 
  at AwesomeApp.iOS.Application.Main (System.String[] args) [0x00001] in /Users/karl/Projects/AwesomeApp/iOS/Main.cs:17