我在使用 Visigo.Sharepoint.FormsBasedAuthenticaiton Web 部件进行注册时遇到问题。有时会显示未知错误，有时会正常显示，这让我相信它与场中的一台服务器有关。所以我直接进入 server1 上的登录页面，一切都很好，当我进入 server2 上的登录页面时，我得到一个错误页面，上面写着找不到文件。
我使用错误屏幕上提供的 Correlation ID 查看了日志，发现这似乎表明 PasswordRecoveryWebPart 是问题所在。
System.IO.FileNotFoundException: The Web application at http://site2/pages/login.aspx could not be found. Verify that you have typed the URL correctly. If the URL should be serving existing content, the system administrator may need to add a new request URL mapping to the intended application.
at Microsoft.SharePoint.SPSite..ctor(SPFarm farm, Uri requestUri, Boolean contextSite, SPUserToken userToken)
at Microsoft.SharePoint.SPSite..ctor(String requestUrl)
at Visigo.Sharepoint.FormsBasedAuthentication.Utils.GetMembershipProvider(HttpContext context)
at Visigo.Sharepoint.FormsBasedAuthentication.PasswordRecoveryWebPart.AddPasswordRecoveryControl()
at Visigo.Sharepoint.FormsBasedAuthentication.PasswordRecoveryWebPart.CreateChildControls()
at System.Web.UI.Control.EnsureChildControls()
at System.Web.UI.Control.PreRenderRecursiveInternal()
at System.Web.UI.Control.PreRenderRecursiveInternal()
at System.Web.UI.Control.PreRenderRecursiveInternal()
at System.Web.UI.Control.PreRenderRecursiveInternal()
at System.Web.UI.Control.PreRenderRecursiveInternal()
at System.Web.UI.Control.PreRenderRecursiveInternal()
at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
我开始比较两台服务器上的 FBA 布局和功能文件，没有发现任何缺失。我不确定接下来要看什么以及可能的补救措施是什么。谢谢。
更新
根据下面的问题，我一直在尝试登录第二台服务器，以便可以转到站点设置页面并查看 FBA 用户管理信息。由于我的登录页面与注册页面相同，因此在第二台服务器上出现错误，我创建了一个新页面，其中仅包含自定义登录 Web 部件。不幸的是，直接访问第二台服务器并在日志中获取这些错误时，我似乎无法登录。
SPSecurityTokenService.Issue() failed: System.NullReferenceException: Object reference not set to an instance of an object.
at Microsoft.SharePoint.IdentityModel.SPSecurityTokenService.SPRequestInfo.ValidateFormsAuthProviderNames(Uri context, String membershipProvider, String roleProvider)
at Microsoft.SharePoint.IdentityModel.SPSecurityTokenService.SPRequestInfo.SetProviderNames(RequestSecurityToken request)
at Microsoft.SharePoint.IdentityModel.SPSecurityTokenService.SPRequestInfo..ctor(IClaimsIdentity identity, RequestSecurityToken request, Boolean initializeForActor)
at Microsoft.SharePoint.IdentityModel.SPSecurityTokenService.SPRequestInfo..ctor(IClaimsPrincipal principal, RequestSecurityToken request)
at Microsoft.SharePoint.IdentityModel.SPSecurityTokenService.GetTokenLifetime(Lifetime requestLifetime)
at Microsoft.IdentityModel.SecurityTokenService.SecurityTokenService.Issue(IClaimsPrincipal principal, RequestSecurityToken request)
at Microsoft.SharePoint.IdentityModel.SPSecurityTokenService.Issue(IClaimsPrincipal principal, RequestSecurityToken request)
Request for security token failed with exception: System.ServiceModel.FaultException`1[System.ServiceModel.ExceptionDetail]: Object reference not set to an instance of an object. (Fault Detail is equal to An ExceptionDetail, likely created by IncludeExceptionDetailInFaults=true, whose value is: System.NullReferenceException: Object reference not set to an instance of an object.
at Microsoft.SharePoint.IdentityModel.SPSecurityTokenService.SPRequestInfo.ValidateFormsAuthProviderNames(Uri context, String membershipProvider, String roleProvider)
at Microsoft.SharePoint.IdentityModel.SPSecurityTokenService.SPRequestInfo.SetProviderNames(RequestSecurityToken request)
at Microsoft.SharePoint.IdentityModel.SPSecurityTokenService.SPRequestInfo..ctor(IClaimsIdentity identity, RequestSecurityToken request, Boolean initializeForActor)
at Microsoft.SharePoint.IdentityModel.SPSecurityTokenService.SPRequestInfo..ctor(IClaimsPrincipal principal, RequestSecurityToken request)
at Microsoft.SharePoint.IdentityModel.SPSecurityTokenService.GetTokenLifetime(Lifetime requestLifetime)
at Microsoft.IdentityModel.SecurityTokenService.SecurityTokenService.Issue(IClaimsPrincipal principal, RequestSecurityToken r...)
System.ServiceModel.FaultException`1[[System.ServiceModel.ExceptionDetail, System.ServiceModel, Version=3.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]]: Object reference not set to an instance of an object.
at Microsoft.IdentityModel.Protocols.WSTrust.WSTrustChannel.ReadResponse(Message response)
at Microsoft.IdentityModel.Protocols.WSTrust.WSTrustChannel.Issue(RequestSecurityToken rst, RequestSecurityTokenResponse& rstr)
at Microsoft.IdentityModel.Protocols.WSTrust.WSTrustChannel.Issue(RequestSecurityToken rst)
at Microsoft.SharePoint.SPSecurityContext.SecurityTokenForContext(Uri context, Boolean bearerToken, SecurityToken onBehalfOf, SecurityToken actAs, SecurityToken delegateTo)
at Microsoft.SharePoint.SPSecurityContext.SecurityTokenForFormsAuthentication(Uri context, String membershipProviderName, String roleProviderName, String username, String password, Boolean isPersistent)
at Microsoft.SharePoint.IdentityModel.SPClaimsUtility.AuthenticateFormsUser(Uri context, String userName, String password)
at UHPS.Login.Login.loginControl_Authenticate(Object sender, AuthenticateEventArgs e)
at System.Web.UI.WebControls.Login.AttemptLogin() at System.Web.UI.WebControls.Login.OnBubbleEvent(Object source, EventArgs e)
at System.Web.UI.Control.RaiseBubbleEvent(Object source, EventArgs args) at System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument)
at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)