ASP.NET Identity 2.0 RoleManager.Roles 'Object reference not set to an instance of an object.'

I am using ASP.NET Identity 2.0 with an ASP.NET MVC 5 and EF 6 project. I am attempting to edit the roles associated with the users. In my useradmin controller I have: ``` // // GET: /Users/Edit/1 public async Task<ActionResult> Edit(string id) { if (id == null) { return new HttpStatusCodeResult(HttpStatusCode.BadRequest); } var user = await UserManager.FindByIdAsync(id); if (user == null) { return HttpNotFound(); } var userRoles = await UserManager.GetRolesAsync(user.Id); return View(new EditUserViewModel() { Id = user.Id, Email = user.Email, RolesList = RoleManager.Roles.ToList().Select(x => new SelectListItem() { Selected = userRoles.Contains(x.Name), Text = x.Name, Value = x.Name }) }); } ``` I get the error 'Object reference not set to an instance of an object.' at line: ``` return View(new EditUserViewModel() ``` When I try: ``` // // GET: /Users/Edit/1 public async Task<ActionResult> Edit(string id) { if (id == null) { return new HttpStatusCodeResult(HttpStatusCode.BadRequest); } ViewBag.RoleId = new SelectList(RoleManager.Roles, "Id", "Name"); var user = await UserManager.FindByIdAsync(id); if (user == null) { return HttpNotFound(); } return View("EditUser", user); } ``` I get the error 'Object reference not set to an instance of an object.' at line: ``` ViewBag.RoleId = new SelectList(RoleManager.Roles, "Id", "Name"); ``` Am I missing a configuration setting? At the beginning of the Controller I define: ``` public UserManagementController(ApplicationUserManager userManager, ApplicationRoleManager roleManager) { UserManager = userManager; RoleManager = roleManager; } private ApplicationUserManager _userManager; public ApplicationUserManager UserManager { get { return _userManager ?? HttpContext.GetOwinContext().GetUserManager<ApplicationUserManager>(); } private set { _userManager = value; } } private ApplicationRoleManager _roleManager; public ApplicationRoleManager RoleManager { get { return _roleManager ?? HttpContext.GetOwinContext().Get<ApplicationRoleManager>(); } private set { _roleManager = value; } } ```