System.ArgumentNullException: Value cannot be null. (Parameter 'stringToEscape') at System.UriHelper.EscapeString(String stringToEscape, Boolean checkExistingEscaped, ReadOnlySpan`1 unreserved, Char forceEscape1, Char forceEscape2) at Microsoft.AspNetCore.Http.ResponseCookies.Append(String key, String value, CookieOptions options) at Microsoft.AspNetCore.CookiePolicy.ResponseCookiesWrapper.Append(String key, String value, CookieOptions options) at Website.Core.Models.PageModel.SetLanguage(String lang, HttpContext httpContext) in D:\Projects\PHATTRIENDOTHI\SourceCode\Website\Website.Core\Models\PageModel.cs:line 216 at Website.Core.Models.PageModel.SetLanguage(String lang) in D:\Projects\PHATTRIENDOTHI\SourceCode\Website\Website.Core\Models\PageModel.cs:line 212 at Website.Controllers.HomeController.Article(String[] parameters) in D:\Projects\PHATTRIENDOTHI\SourceCode\Website\Website\Controllers\HomeController.cs:line 819 at Website.Controllers.HomeController.Index(String keyword, String parameter1, String parameter2, String parameter3, String parameter4, String parameter5) in D:\Projects\PHATTRIENDOTHI\SourceCode\Website\Website\Controllers\HomeController.cs:line 83 at Microsoft.AspNetCore.Mvc.Infrastructure.ActionMethodExecutor.TaskOfIActionResultExecutor.Execute(IActionResultTypeMapper mapper, ObjectMethodExecutor executor, Object controller, Object[] arguments) at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.g__Awaited|12_0(ControllerActionInvoker invoker, ValueTask`1 actionResultValueTask) at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.g__Awaited|10_0(ControllerActionInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted) at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Rethrow(ActionExecutedContextSealed context) at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted) at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.g__Awaited|13_0(ControllerActionInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted) 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.g__Awaited|20_0(ResourceInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted) 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.Authentication.AuthenticationMiddleware.Invoke(HttpContext context) at Microsoft.AspNetCore.Session.SessionMiddleware.Invoke(HttpContext context) at Microsoft.AspNetCore.Session.SessionMiddleware.Invoke(HttpContext context) at Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware.Invoke(HttpContext context) HEADERS ======= Accept: */* Connection: close Host: tex.vn Referer: http://tex.vn/giai-phap/giai-phap-giao-duc-elearning-1581 User-Agent: claudebot