What does your config file look like? (The <sites> tag inside the <episerver ...> tag)
<sites>
<site siteId="unknown" description="Example Site">
<siteSettings categoryId="1" enableScheduler="true" enableEvents="true" enableRemoteEvents="false" errorMailHandler="~/util/SendErrorReport.aspx" globalErrorHandling="RemoteOnly" globalErrorMail="" httpCacheExpiration="0:0:0" httpCacheability="Public" httpCacheVaryByCustom="path" httpCacheVaryByParams="id,epslanguage" indexingDelayAfterPublish="0:0:20" indexingTextRegExp="[\p{N}\p{L}]{1}[\p{N}\p{L}-\._]*[\p{N}\p{L}]{1}" logServiceUrl="soap.tcp://localhost/TimeSpanAnalyzerView" mirroringFileWriteRetryDelay="0:0:5" mirroringHtmlTextEncoding="" mirroringRetries="5" mirroringRetryDelay="0:0:1" pageCacheSlidingExpiration="12:0:0" pageFolderVirtualPathProvider="SitePageFiles" pageOfficeStartId="0" pageRootId="1" pageStartId="3" pageUseBrowserLanguagePreferences="false" pageValidateTemplate="false" pageWastebasketId="2" remoteCacheListenerShortNames="" remotePageCacheSlidingExpiration="2:0:0" remoteWebServiceCulture="0" sgmlParserDecodeCharEntities="false" stringCompressionThreshold="0" stringDelayedLoadThreshold="0" subscriptionHandler="EPiServer.Personalization.SubscriptionMail,EPiServer" uiDefaultPanelTab="0" uiEditorColors="" uiEditorCssPaths="" uiEditorHeight="250" uiEditorValueOptions="0" uiEditorWidth="500" uiImageTransparencyReplacement="White" uiKeepUserLoggedOn="true" uiMaxVersions="0" uiOptimizeTreeForSpeed="false" uiSafeHtmlTags="b,i,u,br" uiShowGlobalizationUserInterface="true" uiTheme="" uiVersionMerging="true" urlRewriteExtension="" urlRebaseKind="ToRootRelative" operationCompatibility="None" siteDisplayName="PublicTemplates" siteUrl="http://home-9dccd0089f:17001/" uiUrl="~/UI/Admin/" utilUrl="~/util/" />
</site>
</sites>
You need to install EPiServer CMS 5.2.375.7 and after that upgrade your site using by EPiServer Installation Manager. If you did not see the shortcut to the Manager in the Programs Menu - you can find the application in "C:\Program Files\EPiServer\Shared\Install\EPiServerInstall.exe"
I do not think you need it in R2, but in R1, you needed a application id attribute in your sites tag: (But it matches your error description....)
<site applicationId="/LM/W3SVC/123/ROOT"description="Example Site 1">
Have a look here for description:
Edit:
You get the application ID from IIS.
Hello
Guys, I have following problem
I have installed EPiServer CMS 5 R2 SP1 and I want to upgrade it to EPiServer CMS 5 R2 SP2
When I open it in EPiServer CMS Manager (2.0.19.10) it says
"
The site configuration could not be loaded:
System.Exception:
Could not find a site element with applicationId '/LM/W3SVC/594704931/root'
at EPiServerManager.Components.SiteConfiguration.LoadConfigurationFile()
at EPiServerManager.Components.SiteConfiguration..ctor(SiteBase siteBase)
at EPiServerManager.Components.SiteBase.LoadConfiguration()
at EPiServerManager.Controls.InfoPanelControls.SiteTabs.Setup()
"
And repeats this error whatever I try to do in Manager.
Please help.