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Common Umbraco error messages

umbracoWith more and more of our Windows hosting customers using the popular CMS (content management system) Umbraco everyday, we decided to compile a list of common errors that occur during the installation.

Please note some fixes may need to have permissions manually applied, for these please contact a member of the support team on the usual methods.


Error:

[SecurityException: Request failed.]
umbraco.dialogs.about.Page_Load(Object sender, EventArgs e) +0
System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e) +14
System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +35
System.Web.UI.Control.OnLoad(EventArgs e) +91
umbraco.BasePages.BasePage.OnLoad(EventArgs e) +14
System.Web.UI.Control.LoadRecursive() +74
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +8431
System.Web.UI.Page.ProcessRequest(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +253
System.Web.UI.Page.ProcessRequest() +78
System.Web.UI.Page.ProcessRequestWithNoAssert(HttpContext context) +21
System.Web.UI.Page.ProcessRequest(HttpContext context) +49
ASP.umbraco_dialogs_about_aspx.ProcessRequest(HttpContext context) +4
System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +100
System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +75

Fix:

Ensure your application pool is correctly named and running the correct identity


Error:

[SecurityException: Request failed.]
umbraco.dialogs.about.Page_Load(Object sender, EventArgs e) +0
System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e) +14
System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +35
System.Web.UI.Control.OnLoad(EventArgs e) +91
umbraco.BasePages.BasePage.OnLoad(EventArgs e) +14
System.Web.UI.Control.LoadRecursive() +74
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +8431
System.Web.UI.Page.ProcessRequest(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +253
System.Web.UI.Page.ProcessRequest() +78
System.Web.UI.Page.ProcessRequestWithNoAssert(HttpContext context) +21
System.Web.UI.Page.ProcessRequest(HttpContext context) +49
ASP.umbraco_dialogs_about_aspx.ProcessRequest(HttpContext context) in App_Web_about.aspx.10695ae8.pz5qfoyu.0.cs:0
System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +100
System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +75

Fix:

Ensure your application pool is correctly named and running the correct identity


Error:

Exception Details: System.UnauthorizedAccessException: Access to the path 'H:\hshome\username\domainname.co.uk\App_Data\TEMP\PluginCache\umbraco-plugins.hash' is denied.

Fix:

Grant permissions to NETWORK SERVICE user


Error:

Error executing scheduled task: System.UriFormatException: Invalid URI: The hostname could not be parsed. at System.Uri.CreateThis(String uri, Boolean dontEscape, UriKind uriKind) at System.Net.WebRequest.Create(String requestUriString) at umbraco.presentation.publishingService.getTaskByHttp(String url) at umbraco.presentation.publishingService.CheckPublishing(Object sender)

Fix:

The issue is caused by the built-in task scheduler. Check the config\umbracoSettings.config file and find the scheduledTasks node. There you’ll find something that is supposed to run every five minutes and has a wrong URL specified.

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Last modified: 14/08/2019