In WordPress when you are trying to customize your website from the WordPress live customizer, and if you receive the error message in preview : “Non-existent changeset UUID“. And there is no further information to troubleshoot the problem.
We have found this problem occurred for three known issues till now. If you are having this problem with some other issue kindly report that to us.
You have copied URL with query string customize_changeset_uuid
Check in your address bar if you find customize_changeset_uuid in the URL. Then remove it cause it uses a unique id which expires after customization is complete. So when you are trying reach a URL this query string should not present in your address “customize_changeset_uuid”. Otherwise it would return error non-existent customize_changeset_uuid
So in this case you are trying to share preview link with the world make sure your URL doesn’t include ” customize_changeset_uuid ” and the problem would be resolved.
The mismatch between your actual website URL Causing non-existent changeset UUID
This problem usually occurs when there’s a mismatch between your actual website URL and the one saved in your WordPress general settings.
This can be also problem in your https://www. and https:// without www. URL problem so make sure your website is redirecting properly SSL url’s and also www. or non www.
For example if in settings >> General your website url is https://webfulcreations.com in that case all following URL’s properly redirect to https://webfulcreations.com
Also make sure the website URL is correct following steps :
- Connect to your WordPress admin
- Navigate to Settings > General in the left panel
- Make sure your WordPress Address and your Site Address are exactly the same
- Save your changes
Problem in settings of a redirect plugin causing non-existent changeset UUID
The second reason we found was because of a redirect plugin which was redirecting a page to wrong URL in website. So please analyze your redirect plugin settings and if possible check track the page which is giving the URL through redirect plugin. If your plugin is redirecting that to a bad url.
Note: If you find any other reason which is bringing this error please report that in comments.
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