I am abit confused why you sent me the example link. I have it implemented now (the lastest build) and it causes the error.
Here is the configuration - which I use to edit the page directly.
sEditor.AutoConfigure = CuteEditor.AutoConfigure.Compact"
sEditor.ShowHtmlMode =
False
sEditor.ShowEditMode = True
sEditor.FullPage = True
sEditor.ShowPreviewMode = False
sEditor.ShowBottomBar = False
sEditor.ThemeType = CuteEditor.ThemeType.Custom
sEditor.ShowCodeViewToolBar = True
sEditor.EditorWysiwygModeCss = CSSFile
sEditor.EnableStripScriptTags = False
sEditor.EditCompleteDocument = True
sEditor.AllowEditServerSideCode = True
sEditor.ActiveTab = CuteEditor.TabType.Code