处理请求时发生未处理的异常。InvalidOperationException：在尝试激活"Taste.Areas.Identity.Pages.Account.RegisterModel"时，无法解析类型为"Microsoft.AspNetCore.Identity.UI.Services.IEmailSender"的服务。Microsoft.Extensions.DependencyInjection.ActivatorUtilities.GetService(IServiceProvider sp，Type Type，Type requiredBy，bool isDefaultParameterRequired)
堆栈查询Cookie标头路由InvalidOperationException：在尝试激活"Taste.Areas.Identity.Pages.Account.RegisterModel"时，无法解析类型为"Microsoft.AspNetCore.Identity.UI.Services.IEmailSender"的服务。Microsoft.Extensions.DependencyInjection.ActivatorUtilities.GetService(IServiceProvider sp，Type Type，Type requiredBy，bool isDefaultParameterRequired)lambda_method(闭包，IServiceProvider，object[])Microsoft.AspNetCore.Mvc.RazorPages.Infrastructure.DefaultPageModelActivatorProvider+<>c__DisplayClass1_0.b_0(页面上下文)Microsoft.AspNetCore.Mvc.RazorPages.Infrastructure.DefaultPageModelFactoryProvider+<>c__DisplayClass3_0.b_0(页面上下文页面上下文)Microsoft.AspNetCore.Mvc.RazorPages.Infrastructure.PageActionInvoker.CreateInstance()Microsoft.AspNetCore.Mvc.RazorPages.Infrastructure.PageActionInvoker.Next(ref State Next，ref Scope Scope，ref object State，ref bool isCompleted)Microsoft.AspNetCore.Mvc.RazorPages.Infrastructure.PageActionInvoker.InvokeInnerFilterAsync()Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.g_Await|24_0(ResourceInvoker调用程序，Task lastTask，State next，Scope Scope，object State，bool isCompleted)Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Rethrow(ResourceExecutedContextSealed上下文)Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Next(ref State Next，ref Scope Scope，ref object State，ref bool isCompleted)Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.InvokeFilterPipelineAsync()Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.g_Logged|17_1(资源调用程序调用程序)Microsoft.AspNetCore.Builder.RouterMiddleware.IInvoke(HttpContext HttpContext)Microsoft.AspNetCore.Authorization.AuthenticationMiddleware.IInvoke(HttpContext上下文)Microsoft.AspNetCore.Authentication.AuthenticationMiddleware.IInvoke(HttpContext上下文)Microsoft.AspNetCore.Diagnostics.EntityFrameworkCore.MigrationsEndPointMiddleware.IInvoke(HttpContext上下文)Microsoft.AspNetCore.Diagnostics.EntityFrameworkCore.DatabaseErrorPageMiddleware.IInvoke(HttpContext HttpContext)Microsoft.AspNetCore.Diagnostics.EntityFrameworkCore.DatabaseErrorPageMiddleware.IInvoke(HttpContext HttpContext)Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware.IInvoke(HttpContext上下文)
处理请求时发生未处理的异常。InvalidOperationException：在尝试激活"Taste.Areas.Identity.Pages.Account.RegisterModel"时，无法解析类型为"Microsoft.AspNetCore.Identity.UI.Services.IEmailSender"的服务。Microsoft.Extensions.DependencyInjection.ActivatorUtilities.GetService(IServiceProvider sp，Type Type，Type requiredBy，bool isDefaultParameterRequired)
堆栈查询Cookie标头路由InvalidOperationException：在尝试激活"Taste.Areas.Identity.Pages.Account.RegisterModel"时，无法解析类型为"Microsoft.AspNetCore.Identity.UI.Services.IEmailSender"的服务。Microsoft.Extensions.DependencyInjection.ActivatorUtilities.GetService(IServiceProvider sp，Type Type，Type requiredBy，bool isDefaultParameterRequired)lambda_method(闭包，IServiceProvider，object[])Microsoft.AspNetCore.Mvc.RazorPages.Infrastructure.DefaultPageModelActivatorProvider+<>c__DisplayClass1_0.b_0(页面上下文)Microsoft.AspNetCore.Mvc.RazorPages.Infrastructure.DefaultPageModelFactoryProvider+<>c__DisplayClass3_0.b_0(页面上下文页面上下文)Microsoft.AspNetCore.Mvc.RazorPages.Infrastructure.PageActionInvoker.CreateInstance()Microsoft.AspNetCore.Mvc.RazorPages.Infrastructure.PageActionInvoker.Next(ref State Next，ref Scope Scope，ref object State，ref bool isCompleted)Microsoft.AspNetCore.Mvc.RazorPages.Infrastructure.PageActionInvoker.InvokeInnerFilterAsync()Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.g_Await|24_0(ResourceInvoker调用程序，Task lastTask，State next，Scope Scope，object State，bool isCompleted)Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Rethrow(ResourceExecutedContextSealed上下文)Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Next(ref State Next，ref Scope Scope，ref object State，ref bool isCompleted)Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.InvokeFilterPipelineAsync()Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.g_Logged|17_1(资源调用程序调用程序)Microsoft.AspNetCore.Builder.RouterMiddleware.IInvoke(HttpContext HttpContext)Microsoft.AspNetCore.Authorization.AuthenticationMiddleware.IInvoke(HttpContext上下文)Microsoft.AspNetCore.Authentication.AuthenticationMiddleware.IInvoke(HttpContext上下文)Microsoft.AspNetCore.Diagnostics.EntityFrameworkCore.MigrationsEndPointMiddleware.IInvoke(HttpContext上下文)Microsoft.AspNetCore.Diagnostics.EntityFrameworkCore.DatabaseErrorPageMiddleware.IInvoke(HttpContext HttpContext)Microsoft.AspNetCore.Diagnostics.EntityFrameworkCore.DatabaseErrorPageMiddleware.IInvoke(HttpContext HttpContext)Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware.IInvoke(HttpContext上下文)
根据文档，您似乎在RegisterModel中使用IEmailSender，但不应该使用。
通常，该错误表示缺少依赖项，在您的情况下是IEmailSender的实现。有关如何注册依赖项的信息，请参阅文档。