[InvalidOperationException: Operation is not valid due to the current state of the object.]
Microsoft.SharePoint.ApplicationRuntime.SPLayoutsMappedFile.MapLayoutsVirtualPath(String virtualPath) +20217119
Microsoft.SharePoint.ApplicationRuntime.SPVirtualPathProvider.GetCacheKey(String virtualPath) +77
Microsoft.SharePoint.Publishing.Internal.CmsVirtualPathProvider.GetCacheKey(String virtualPath) +31
System.Web.Compilation.BuildManager.GetCacheKeyFromVirtualPath(VirtualPath virtualPath, Boolean& keyFromVPP) +38
System.Web.Compilation.BuildManager.GetVPathBuildResultInternal(VirtualPath virtualPath, Boolean noBuild, Boolean allowCrossApp, Boolean allowBuildInPrecompile) +82
System.Web.Compilation.BuildManager.GetVPathBuildResultWithNoAssert(HttpContext context, VirtualPath virtualPath, Boolean noBuild, Boolean allowCrossApp, Boolean allowBuildInPrecompile) +116
System.Web.UI.TemplateControl.LoadControl(VirtualPath virtualPath) +69
Newsletter.Newsletter.Newsletter.CreateChildControls() +120
System.Web.UI.Control.EnsureChildControls() +146
System.Web.UI.Control.PreRenderRecursiveInternal() +61
System.Web.UI.Control.PreRenderRecursiveInternal() +224
System.Web.UI.Control.PreRenderRecursiveInternal() +224
System.Web.UI.Control.PreRenderRecursiveInternal() +224
System.Web.UI.Control.PreRenderRecursiveInternal() +224
System.Web.UI.Control.PreRenderRecursiveInternal() +224
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +3394