Cornerstone not displaying properly (error code included)

I am having an issue with the cornerstone plugin not displaying properly when editing. I have the most current version of theme and cornerstone installed, but this is happening: ReferenceError: xToggleLock is not defined /wp-content/plugins/cornerstone/assets/dist/js/app.2155f74.js

Hello Michelle,

Thanks for writing to us.

It seems that there might be an issue of plugin conflict. I would suggest you troubleshoot with a few of the common issues before we investigate your settings.

  1. Testing For Theme Related Issue
  2. Testing For Plugin Conflict
  3. Theme Update
  4. Child Theme
  5. Css/Js Customization
  6. Increasing Php Memory Limit
  7. Disabling Cache
  8. Disabling Cdn
  9. Permalinks
  10. Version Compatibility

If none of those work, It would be best if you could copying your live website to your staging area. and send your details in a secure note so that we can investigate your setting without breaking your live site. Please provide the following details

  • WordPress Login URL
  • Admin level username and password
  • FTP Details

You can find the Secure Note button at the bottom of your posts


Hi Michelle,

I tried to login but the provided username is not registered on this site. Please double check the username and password. In the mean time please make sure to clear all caches including the browser’s cache and keep the cache plugin/services disabled.


I just added it again, sorry, it was created on the live site.

Hello Michelle,

I tried to access your site but the given credentials are not working. Please recheck and send us again.


Hi Michelle,

I can confirm your issue when accessing your website and after investigating about the said issue, I suspect that the theme is corrupted. Here’s what I did.

  • Uninstall and delete the cornerstone plugin
  • Delete X theme
  • Install a fresh copy of X theme
  • Install again the cornerstone plugin

Then it fixes your issues.

Hope that helps.

Thank you.

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