GlideList is undefined in UI Page.Issue The 'glidelist' object becomes undefined in the contentwindow of the frame. When we changed the GlideList to GlideList2 in the script of the UI pages, the UI page works as expected.ReleaseAllCauseThe probable cause of the issue is the usage of List v3. In the instance with LIST v3 enabled, the GlideList2 will return undefined.ResolutionIn the instance that is using List v2, use GlideList2(return frame.contentWindow.GlideList2.get('incident');) in the UI page. For the instance that has L3 enables, GlideList can be used.