I have a Sitefinity 7.0 project I am developing that has been working fine until a few weeks ago. After a round of Windows updates I would get a 500 error everytime I tried to access the Dashboard or any other backend page. The login worked, but the desired page always failed, whether running in VS2013 or published and run from IIS 7. The production site hosted on WS2008R2 remained trouble free, but the issues affects development on my Windows 8.1 box.
I confirmed the error was caused by Security Update for Microsoft .NET Framework 4.5.1 and 4.5.2 on Windows 8.1 and Windows Server 2012 R2 x64-based Systems (KB3098779). Removing the update resolved the issue. Once a week, every week since, the update is reinstalled automatically without me being able to stop it. The error reappears every time this update is automatically reinstalled.
Log file details:
Message: HandlingInstanceID: 90fbe7e3-4606-4131-bbec-cfc0d6c34060
An exception of type 'System.Web.HttpCompileException' occurred and was caught.
-------------------------------------------------------------------------------
11/18/2015 12:36:19
Type : System.Web.HttpCompileException, System.Web, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a
Message : External component has thrown an exception.
Source : System.Web
Help link :
Results : System.CodeDom.Compiler.CompilerResults
SourceCode :
WebEventCode : 0
ErrorCode : -2147467259
Data : System.Collections.ListDictionaryInternal
TargetSite : System.CodeDom.Compiler.CompilerResults Compile()
HResult : -2147467259
Stack Trace : at System.Web.Compilation.AssemblyBuilder.Compile()
at System.Web.Compilation.BuildProvidersCompiler.PerformBuild()
at System.Web.Compilation.BuildManager.CompileWebFile(VirtualPath virtualPath)
at System.Web.Compilation.BuildManager.GetVPathBuildResultInternal(VirtualPath virtualPath, Boolean noBuild, Boolean allowCrossApp, Boolean allowBuildInPrecompile, Boolean throwIfNotFound, Boolean ensureIsUpToDate)
at System.Web.Compilation.BuildManager.GetVPathBuildResultWithNoAssert(HttpContext context, VirtualPath virtualPath, Boolean noBuild, Boolean allowCrossApp, Boolean allowBuildInPrecompile, Boolean throwIfNotFound, Boolean ensureIsUpToDate)
at System.Web.Compilation.BuildManager.GetVirtualPathObjectFactory(VirtualPath virtualPath, HttpContext context, Boolean allowCrossApp, Boolean throwIfNotFound)
at System.Web.Compilation.BuildManager.CreateInstanceFromVirtualPath(VirtualPath virtualPath, Type requiredBaseType, HttpContext context, Boolean allowCrossApp)
at Telerik.Sitefinity.Web.UI.ControlUtilities.CompileControl(String virtualPath)
at Telerik.Sitefinity.Web.UI.ControlUtilities.LoadControl(String virtualPath, Page page)
at Telerik.Sitefinity.Web.UI.VirtualPathTemplate.InstantiateIn(Control container, PlaceHoldersCollection placeHolders)
at Telerik.Sitefinity.Web.UI.SimpleView.CreateContainer(ITemplate template)
at Telerik.Sitefinity.Web.UI.SimpleView.get_Container()
at Telerik.Sitefinity.Web.UI.SimpleView.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.Control.PreRenderRecursiveInternal()
at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
at System.Web.UI.Page.ProcessRequest(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
at System.Web.UI.Page.ProcessRequest()
at System.Web.UI.Page.ProcessRequest(HttpContext context)
at ASP.sfpageservice_45d368fb_a8a8_4cb0_8929_9f5d2f788882_120t8d6701230_default_aspx.ProcessRequest(HttpContext context) in c:\Windows\Microsoft.NET\Framework64\v4.0.30319\Temporary ASP.NET Files\root\4e8361a9\d9057781\App_Web_45d368fb-a8a8-4cb0-8929-9f5d2f788882_120t8d6701230_default.aspx.d63928b6.xuf1ckmk.0.cs:line
0
at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)
Additional Info:
TimeStamp : 18/11/2015 2:36:19 AM
FullName : Telerik.Sitefinity.Utilities, Version=7.0.5114.0, Culture=neutral, PublicKeyToken=b28c218413bdf563
AppDomainName : /LM/W3SVC/20/ROOT-1-130922877442563104
WindowsIdentity : IIS APPPOOL\AITSL-Source