Sorry no solution, but the same problem here. The backoffice has worked for over 6 months, but now the metioned error occurs. It occurs on a production site, so please provide a solution!

This is probably caused by a problem where EPiServer.Mail can not figure out what site it should use for loading settings.

Verify that siteId has a value matching the values defined in episerver.framwork>siteHostMapping OR has a wildcard (*).

You should find siteId in episerver.common, episerver.community, episerver.mail and episerver.mail.communitysource. Most of them are in web.config but episerver.mail is by default in a separate file (episerver.mail.config).

If you only find hostname="Default" your config file is old and you need to replace hostname with siteId.

<episerver.mail>
  <sites>
    <site siteId="*" >

Thank you for your response.

We don't use EPiServer mail, so we didn't have the configurationfile. I added an Episerver mail section in my web.config:

<sectionname="episerver.mail"type="EPiServer.Common.Configuration.EPiServerMailSection, EPiServer.Common.Mail"/>

and:

<episerver.mail>
 <sites>
  <site siteId="*">
  </site>
 </sites>
</episerver.mail>

Unfortunately, the same error keeps appearing. Is there a way to disable the control. We don't use EPi-mail, so i don't understand why the plugin is loaded suddenly in my tabstrip. I tried disabeling in tblPlugin, but no luck.

Thank you in advance!

Just adding an empty configuration node for EPiServer.Mail will probably not help. Either you configure it completly or remove it.

You must have assemblies (dll) for EPiServer.Mail in your web application's bin-folder. It is bundled together with the Relate-templates so that is why you got it. You can safely remove them from you site or use the plug-in manager in admin mode to disable them.

Thanks a lot, removing the EPiServer.Mail indeed fixed the Edit-mode for the content-pages!!

However, now i seem to have stumbled on the reason someone added the EPiServer.Mail dll's to the website. Opening the Community->Moderation Mode->Search Members page exposes the next error message:

Parser Error

Description: An error occurred during the parsing of a resource required to service this request. Please review the following specific parse error details and modify your source file appropriately.

Parser Error Message: Could not load type 'EPiServer.Mail.Sources.EPiServerCommunitySearch.Web.EPiServerMailEPiServerCommunitySearchSource'.

Source Error:

Line 1: <%@ Control Language="C#" AutoEventWireup="true" CodeBehind="EPiServerMailEPiServerCommunitySearchSource.ascx.cs" Inherits="EPiServer.Mail.Sources.EPiServerCommunitySearch.Web.EPiServerMailEPiServerCommunitySearchSource" %> Line 2:  
Line 3:  <div class="section"><% = EPiServer.Common.Globalization.GlobalizationHandler.Instance.GetTranslation("EPiServer.Mail.Sources.EPiServerCommunitySearch.Web.Header") %></div>

Source File: /EPiServerCommunity/Modules/Mypage/SearchExtensions/EPiServerMailEPiServerCommunitySearchSource.ascx    Line: 1

Adding the EPiServer.Mail.Sources.EPiServerCommunitySearch.dll to the bin-folder gives an error message that Episerver.Mail.Core is needed, so that's probably why the EPiServer.Mail dll's all ended up in the website.

I suggest that you make a fresh installation using EPiServer Deployment Center of a Relate+ 2.0 site (or EPiServer Mail 5) and that you the copy the EPiServer.Mail.config file.

You can also look at the template-file used by the installer:
C:\Program Files (x86)\EPiServer\Mail\5.0.343.136\Install\Configuration\EPiServerMail.config

Hi

I am facing this same problem. This seems to be popping up randomly on my local development environment. 

I have checked the web.config and episervermail.config.

Is there anything else we can do about this issue?

first time error is: 

[NullReferenceException: Object reference not set to an instance of an object.]
   EPiServer.Mail.Core.EP.Web.MailEditPanelPlugIn.CheckAccess() +80
   EPiServer.Mail.Core.EP.Web.MailEditPanelPlugIn.List() +16
   EPiServer.PlugIn.AssemblyTypeInfo.UseCustomLoader(Type type, PlugInAttribute matchAttribute, ArrayList list) +60

[PlugInException: A error occured while calling ICustomPlugInLoader.List from "EPiServer.Mail.Core.EP.Web.MailEditPanelPlugIn": Object reference not set to an instance of an object.]

then the error points to this when i refresh the page

Object ref not set :- src="https://<%EPiServer.Mail.Core.EPiServerMailModule.Settings.BrokerHostName %> 

FileName :- AccountStatistics.ascx

Appreciate your help! 

Regards,