[NullReferenceException: Object reference not set to an instance of an object.]
Web1080.LoaiPicker.CreateChildControls() +721
System.Web.UI.Control.EnsureChildControls() +105
System.Web.UI.Control.PreRenderRecursiveInternal() +65
System.Web.UI.Control.PreRenderRecursiveInternal() +255
System.Web.UI.Control.PreRenderRecursiveInternal() +255
System.Web.UI.Control.PreRenderRecursiveInternal() +255
System.Web.UI.Control.PreRenderRecursiveInternal() +255
System.Web.UI.Control.PreRenderRecursiveInternal() +255
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +6874
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