Missing button icons in the Touch UI

The Toggle Side Panel and Emulator icons are missing in page editor Touch UI (/editor.html). Disabling Link Rewriting, clearing the cache, and restarting the AEM instance doesn't help.


When the Trim Spaces feature is enabled on the org.apache.sling.scripting.jsp.JspScriptEngineFactory configuration, it causes the spaces to be removed between some CSS classes in the Touch UI HTML.


To fix the issue, disable Trim Spaces:

  1. Go to this URL http://host:port​/system/console/configMgr/org.apache.sling.scripting.jsp.JspScriptEngineFactory.

  2. Disable Trim Spaces by unchecking the check box.

  3. Save.


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