I am trying to create a new form.

I have a form set to send an email and redirect to a URL.

I add one field ok. Then I try to add second.

I receive this error:

An error occurred when processing your request. Please contact your administrator for help.

With this exception being generated in the background:

System.Web.HttpUnhandledException: Exception of type System.Web.HttpUnhandledException was thrown. ---> System.Exception: An error occured: Class node not found, please check the directory cmsdesk/metadata/BizForms/CheckInForm. at Kentico.CMS.MetadataEngine.MetadataProvider.EnsureSettings(String applicationName, String className) at Kentico.CMS.MetadataEngine.MetadataProvider.GetSettingsValue(String className, String key) at Kentico.CMS.MetadataEngine.QueryGenerator.GetQuery(String className, BasicQueriesEnum queryType) at Kentico.CMS.CMSDesk.EditBizFormField.CreateFormFiles(String formName, String tableName) at Kentico.CMS.CMSDesk.EditBizFormField.btnOK_Click(Object sender, EventArgs e) at System.Web.UI.WebControls.Button.OnClick(EventArgs e) at System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) at System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) at System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) at System.Web.UI.Page.ProcessRequestMain() --- End of inner exception stack trace --- at System.Web.UI.Page.HandleError(Exception e) at System.Web.UI.Page.ProcessRequestMain() at System.Web.UI.Page.ProcessRequest() at System.Web.UI.Page.ProcessRequest(HttpContext context) at System.Web.CallHandlerExecutionStep.System.Web.HttpApplication+IExecutionStep.Execute() at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)

The field is created in the DB but does not appear on the form from the CMS Desk. I tried recreating the form and the same thing happened again.

Fields I tried to add

Last Name
LastName
Textbox - 255 max
Allow empty
[Successful]

First Name
FirstName
Textbox - 255 max
Not allowed empty
[Fails]

This also failed:

Legal Residence in US
LegalResidence
Text Area - 500 max
Allow empty
[Fails]

The problem is intermittent - I cannot be sure when exactly it will happen.