When I try to use the experience editor I get an error that causes the loading sign to just keep spinning and it also prevents the Ribbon menu at the top from displaying.

Javascript error sitecore experience editor

Heres where the error is occuring in the "LargeDropDownButton.js" file enter image description here

  • Have you changed something recently that could have caused this? Added a new ribbon button, changed security on ribbon items, etc. Commented Feb 12, 2019 at 17:11
  • Have you fixed that already? I have similar issue. Commented Mar 14, 2019 at 11:35

1 Answer 1


I had exactly the same issue. In my case, it turned out that we had an old version of sitecore\shell\client\Sitecore\ExperienceEditor\ExperienceEditor.js file. After I replaced it with a new one problem solved. Sitecore 8.2 u7

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