[InvalidOperationException: The control with ID 'TextBoxWatermarkExtender1' requires a ScriptManager on the page. The ScriptManager must appear before any controls that need it.]
System.Web.UI.ExtenderControl.get_ScriptManager() +537377
System.Web.UI.ExtenderControl.RegisterWithScriptManager() +137
AjaxControlToolkit.ExtenderControlBase.OnPreRender(EventArgs e) in f:\TeamCity\buildAgent\work\80acd78aa4c25314\Server\AjaxControlToolkit\ExtenderBase\ExtenderControlBase.cs:365
System.Web.UI.Control.PreRenderRecursiveInternal() +132
System.Web.UI.Control.PreRenderRecursiveInternal() +227
System.Web.UI.Control.PreRenderRecursiveInternal() +227
System.Web.UI.Control.PreRenderRecursiveInternal() +227
System.Web.UI.Control.PreRenderRecursiveInternal() +227
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +3671
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