non-existent changeset uuid

WordPress is the most popular content management system used by millions of people.If you’ve started a blog or any other site with WordPress, you may face rare WordPress issues from time to time. One of these issues is the appearance of non-existent changeset uuid error. You will see this error when you try to access live customize option . In this article you’ll learn what causes this error and how to fix this error.

What Causes Non-Existent changeset UUID Error ?

Once in a while many wordpress users are reporting that they can’t preview their site anymore in the live customizer tinstead they see a error message ” Non-existent changeset UUID “. We’ve also seen reports in the wordpress forums where people are unable to see the admin bar on the homepage or couldn’t preview posts anymore. Some users have also reported that they see squares instead of icons.

This error happens when the site url differs from the wordpress url .For example

WordPress Address (URL) :
Site Address (URL)             :

As you can see, this difference in url results in Cross Origin Resource Sharing ( CORS ) and browsers such as Firefox and Chrome will block your icon font files and prevent them from loading into your browser. This results in icons showing up as squares.

How to Fix This Error ?

Fixing this error is simple and you don’t need any technical skills to do it.

  1. Login to your WordPress dashboard.
  2. Go to Settings -> General
  3. Find the setting-> WordPress Address (URL) and Site Address (URL)
  4. Make sure both settings has identical values.

For example :- In your Site Address (URL), if you have entered

Then make sure you have entered the same in WordPress Address (URL) input,

A difference such as http and https or www will cause such CORS issue.

After you’ve entered the correct URLs of your site in your WordPress dashboard, the error message non-existent changeset UUID will disappear and your customizer will load normally. However, make sure that you enter the correct URLs, otherwise there is a risk that you might  break your site. In such case you won’t be able to login anymore and you might need to correct the URLs in your wp-config.php file.

We hope that you’ve been able to resolve the Non-existent changeset UUID error. If you’re looking for more WordPress tutorials, then subscribe to our blog now. In case you have additional questions about this issue, please let us know in the comments.

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