title: The controller for path '/Admin/Widget/ConfigureWidget' was not found or does not implement IController
body: <p>I have a Nopcommerce 3.30 (with source code) project and I have configured my own Widget plugin. When I have install it and I'm trying to configure it in '../Admin/Widget/List', the following error Appears:</p>
  
  <blockquote>
    <p>The controller for path '/Admin/Widget/ConfigureWidget' was not found
    or does not implement IController.</p>
    
    <p>Description: An unhandled exception occurred during the execution of
    the current web request. Please review the stack trace for more
    information about the error and where it originated in the code. </p>
    
    <p>Exception Details: System.Web.HttpException: The controller for path
    '/Admin/Widget/ConfigureWidget' was not found or does not implement
    IController.</p>
  </blockquote>
  
  <p>Source Error: </p>
  
  <pre><code>Line 12: @if (!String.IsNullOrEmpty(Model.ConfigurationActionName))
  Line 13: {
  Line 14:     @Html.Action(Model.ConfigurationActionName, Model.ConfigurationControllerName, Model.ConfigurationRouteValues);
  Line 15: }
  Line 16: else
  </code></pre>
  
  <p>Plugin controller:</p>
  
  <pre><code>using System.Web.Mvc;
  using Nop.Core;
  using Nop.Core.Caching;
  using Nop.Plugin.Widgets.ApplicationNotes.Infrastructure.Cache;
  using Nop.Plugin.Widgets.ApplicationNotes.Models;
  using Nop.Services.Configuration;
  using Nop.Services.Media;
  using Nop.Services.Stores;
  using Nop.Web.Framework.Controllers;
  
  namespace Nop.Plugin.Widgets.ApplicationNotes.Controllers
  {
      class WidgetsApplicationNotesController : BasePluginController
      {
  
                  private readonly IWorkContext _workContext;
          private readonly IStoreContext _storeContext;
          private readonly IStoreService _storeService;
          private readonly IPictureService _pictureService;
          private readonly ISettingService _settingService;
          private readonly ICacheManager _cacheManager;
  
          public WidgetsApplicationNotesController(IWorkContext workContext,
              IStoreContext storeContext,
              IStoreService storeService, 
              IPictureService pictureService,
              ISettingService settingService,
              ICacheManager cacheManager)
          {
              this._workContext = workContext;
              this._storeContext = storeContext;
              this._storeService = storeService;
              this._pictureService = pictureService;
              this._settingService = settingService;
              this._cacheManager = cacheManager;
          }
  </code></pre>
  
  <p>This is my plugin class</p>
  
  <pre><code>using Nop.Core;
  using Nop.Core.Plugins;
  using Nop.Services.Cms;
  using Nop.Services.Configuration;
  using Nop.Services.Localization;
  using Nop.Services.Media;
  using System.Collections.Generic;
  using System.IO;
  using System.Web.Routing;
  
  namespace Nop.Plugin.Widgets.ApplicationNotes
  {
      public class ApplicationNotesPlugin: BasePlugin, IWidgetPlugin
      {
  
          private readonly IPictureService _pictureService;
          private readonly ISettingService _settingService;
          private readonly IWebHelper _webHelper;
  
          public ApplicationNotesPlugin(IPictureService pictureService, 
              ISettingService settingService, IWebHelper webHelper)
          {
              this._pictureService = pictureService;
              this._settingService = settingService;
              this._webHelper = webHelper;
          }
  
          /// &lt;summary&gt;
          /// Gets widget zones where this widget should be rendered
          /// &lt;/summary&gt;
          /// &lt;returns&gt;Widget zones&lt;/returns&gt;
          public IList&lt;string&gt; GetWidgetZones()
          {
              return new List&lt;string&gt;() { "home_page_top" };
          }
  </code></pre>
  
  <p>I don't understand what's the source of the error.
  Thanks</p>