Documentation

Editing pages fails after switching to Developer mode in AEM 6.5.23

Last update: Mon Oct 13 2025 00:00:00 GMT+0000 (Coordinated Universal Time)

After applying AEM 6.5.23, switching to Developer mode in the page editor disables editing functionality. The browser console logs errors from /libs/cq/gui/components/authoring/editors/clientlibs/core.js, indicating a JavaScript failure. To resolve the issue, clear the browser cache or use incognito mode.

Description description

Environment

Adobe Experience Manager, 6.5.23

Issue/Symptoms

  • The Developer panel does not appear in the page editor.

  • Switching between editing modes (Edit, Layout, Timewarp, etc.) fails.

  • Console errors originate from core.js in the authoring editor client library. Example error:

    code language-none 
    core.js:363 Uncaught TypeError: Cannot read properties of null (reading '0')        at getDisambiguator (core.js:363:248)        at ns.ui.Overlay.renderName (core.js:365:324)        at ns.ui.Overlay.render (core.js:368:117)        at new ns.ui.Overlay (core.js:362:189)        at self.create (core.js:580:482)        at core.js:581:107        at Array.forEach (<anonymous>)        at self.create (core.js:581:78)        at core.js:581:107        at Array.forEach (<anonymous>)

Resolution resolution

Follow these steps to restore editing functionality:

  1. Clear the browser cache and reload the page.
  2. If the issue persists, open the page editor in an incognito or private browsing window.
  3. Monitor for updates, as this issue is tracked under SITES-30922 and a fix is planned for AEM 6.5.24.
recommendation-more-help
3d58f420-19b5-47a0-a122-5c9dab55ec7f