System.InvalidOperationException: Sequence contains more than one element at System.Linq.ThrowHelper.ThrowMoreThanOneElementException() at System.Linq.Enumerable.TryGetSingle[TSource](IEnumerable`1 source, Boolean& found) at lambda_method58(Closure , QueryContext ) at Microsoft.EntityFrameworkCore.Query.Internal.QueryCompiler.Execute[TResult](Expression query) at Microsoft.EntityFrameworkCore.Query.Internal.EntityQueryProvider.Execute[TResult](Expression expression) at System.Linq.Queryable.SingleOrDefault[TSource](IQueryable`1 source, Expression`1 predicate) at Marketing.Topcrab.Controllers.BaseController.loadSEO() in E:\10.蟹状元2022\营销站\Marketing.Topcrab\Controllers\BaseController.cs:line 34 at Marketing.Topcrab.Controllers.BaseController.OnActionExecuting(ActionExecutingContext filterContext) in E:\10.蟹状元2022\营销站\Marketing.Topcrab\Controllers\BaseController.cs:line 25 at Microsoft.AspNetCore.Mvc.Controller.OnActionExecutionAsync(ActionExecutingContext context, ActionExecutionDelegate next) at Microsoft.AspNetCore.Mvc.Filters.ControllerActionFilter.OnActionExecutionAsync(ActionExecutingContext context, ActionExecutionDelegate next) at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted) at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.InvokeInnerFilterAsync() --- End of stack trace from previous location --- at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.g__Awaited|25_0(ResourceInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted) at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Rethrow(ResourceExecutedContextSealed context) at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted) at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.InvokeFilterPipelineAsync() --- End of stack trace from previous location --- at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.g__Awaited|17_0(ResourceInvoker invoker, Task task, IDisposable scope) at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.g__Awaited|17_0(ResourceInvoker invoker, Task task, IDisposable scope) at Microsoft.AspNetCore.Routing.EndpointMiddleware.g__AwaitRequestTask|6_0(Endpoint endpoint, Task requestTask, ILogger logger) at Microsoft.AspNetCore.Authorization.AuthorizationMiddleware.Invoke(HttpContext context) at Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware.Invoke(HttpContext context) HEADERS ======= Accept: */* Host: dzxxzy.com User-Agent: claudebot