signInManager.PasswordSignInAsync 说“对象引用未设置为 object 的实例

Question

我已将服务和模型移至单独的 DLL 以最小化编译时间，现在我在登录时收到此错误。

这是我在异常中看到的堆栈跟踪。

    at Microsoft.EntityFrameworkCore.Internal.EntityFinder`1.FindTracked(Object[] keyValues, IReadOnlyList`1& keyProperties)
   at Microsoft.EntityFrameworkCore.Internal.EntityFinder`1.FindAsync(Object[] keyValues, CancellationToken cancellationToken)
   at Microsoft.EntityFrameworkCore.Internal.InternalDbSet`1.FindAsync(Object[] keyValues, CancellationToken cancellationToken)
   at Microsoft.AspNetCore.Identity.EntityFrameworkCore.UserStore`9.FindTokenAsync(TUser user, String loginProvider, String name, CancellationToken cancellationToken)
   at Microsoft.AspNetCore.Identity.UserStoreBase`5.<GetTokenAsync>d__67.MoveNext()
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
   at Microsoft.AspNetCore.Identity.AuthenticatorTokenProvider`1.<CanGenerateTwoFactorTokenAsync>d__0.MoveNext()
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at Microsoft.AspNetCore.Identity.UserManager`1.<GetValidTwoFactorProvidersAsync>d__133.MoveNext()
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
   at Microsoft.AspNetCore.Identity.SignInManager`1.<IsTfaEnabled>d__58.MoveNext()
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
   at Microsoft.AspNetCore.Identity.SignInManager`1.<CheckPasswordSignInAsync>d__40.MoveNext()
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
   at Microsoft.AspNetCore.Identity.SignInManager`1.<PasswordSignInAsync>d__38.MoveNext()
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
   at Microsoft.AspNetCore.Identity.SignInManager`1.<PasswordSignInAsync>d__39.MoveNext()
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
   at MVCIdentity.Areas.Identity.Controllers.AccountController.<Login>d__22.MoveNext() in D:\Users\jawwad.ayyubi\WorkDocs\Development\LEADRS_Core\Areas\Identity\Controllers\AccountController.cs:line 267

让我知道您是否需要其他任何分析。