How to fix WordPress non-existent changeset UUID Error

If you are running a WordPress website, you may occasionally encounter rare errors such as the ‘non-existent changeset UUID error.’ This error can be resolved by following a few simple steps. In this article, we will explain how to fix the WordPress non-existent changeset UUID error.

What is the non-existent changeset UUID error

Many WordPress users have reported encountering the ‘non-existent changeset UUID error’ when attempting to customize their site using the WordPress Customizer. This issue commonly occurs when using the Customizer and can also cause the Admin Bar to not be visible on the frontend of the website when logged in to the WordPress Admin Panel. As a result, publishing posts may also become difficult.

Users have reported in the WordPress forum that when utilizing the Customizer, they are presented with a white screen and the following error message:

Non-existent changeset UUID.

The issue of the “Non-existent changeset UUID” error in WordPress began with the release of version 4.7. It is typically caused by a misconfiguration during the installation process. The solution to this problem is outlined below.

WordPress non-existent changeset UUID

Occasionally, when using the WordPress live customizer to make changes to your website, you may encounter an error message stating “Non-existent changeset UUID” in the preview frame. This issue typically arises when the “Actual Website URL” and “WordPress URL Address” do not match. It is often caused by an incorrect configuration during the installation process and can be resolved by following the steps outlined below.

How to fix WordPress non-existent changeset UUID

Method 1st : WordPress Admin > Setting > General

To resolve the issue of the “Non-existent changeset UUID” error in WordPress, please follow the method outlined below:

  1. Login to your WordPress website
  2. Go to WordPress Admin Panel
  3. Go to Settings > General
  4. Check that there is no difference between your ‘Actual Website URL’ and ‘WordPress URL Address’
  5. If there is a difference, correct it
  6. Save the changes
  7. Login again

That’s all. In most cases, this method will resolve the issue.

Method 2nd : Change WP URL in wp-config.php File

If the option to change ‘Actual Website URL’ and ‘WordPress URL Address’ is not available in Settings > General, you will need to use the second method to resolve this issue. This method involves updating the URLs in the ‘wp-config.php’ file to match the actual URL and the WordPress URL of your site.

There are several ways to edit the wp-config.php file, such as:

  1. Via FTP
  2. Through cPanel’s File Manager
  3. Using a WordPress File Manager Plugin

You can use any of these methods, but if you are not familiar with cPanel or FTP, the easiest option would be to install and activate a File Manager Plugin on your website and then edit the wp-config.php file from there.

What needs to be edited in the wp-config.php file?

In the wp-config.php file, the ‘WordPress URL Address’ of your website can be found before the line “/* That’s all, stop editing! Happy publishing. */”. To resolve the issue, you will need to replace this URL with the URL that you want for your actual website. Alternatively, you can replace it with the “Site Address (URL)” found in the WordPress Admin > Settings > General section of your website.

For example, see the image below.

wp-config.php file for solving WordPress non-existent changeset UUID Error

As demonstrated in the above image, the WordPress Address (URL) of the site, WP_SITEURL, is defined as “define ( ‘WP_SITEURL’, ‘’ )” in the wp-config.php file. However, the website is currently running on “”.

In this case, an error message ‘non-existent changeset UUID’ will appear when using the customizer. To resolve this issue, we replaced “” with “” in the wp-config.php file. This solved the problem.

How to fix non-existent changeset UUID error on WordPress Multisite

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