Are you a WordPress user who comes across the annoying “Updating Failed. The Response is Not a Valid JSON Response” error message on your site? If so, you came to the right place.

Imagine this- you are carefully updating your website to keep it well and then, all of a sudden, you see an error message. You start to feel worried and find the reason behind this and how to fix it.

In this article, we will look closely at how to fix the ‘Updating Failed’ error when it says ‘Invalid JASON Response’. We will explain what this error means and give you the information and tools you need to tackle it. So, let’s get ready to learn how to cope with this problem.

Understanding the “Updating Failed. The Response is Not a Valid JSON Response” Error

“Updating Failed. The Response is Not a Valid JSON Response” is a common error in WordPress encountered when you try to save changes to a page, post, or any other site content. This error signifies that there is an issue with communication between your website and the server.

This error frequently arises due to conflicts with the themes, plugins, or even your server configuration. It is quite frustrating, as it prevents you from updating your site or making any changes to your content. To fix it, you can try following troubleshooting steps:

  • Check for Theme or Plugin Conflicts – Deactivate all your plugins and switch to the default WordPress theme like Twenty Twenty-One to see if the error persists. If the problem goes away, you can find out what causing it by reactivating each plugin and theme one by one until the problem comes back. This will help you find which plugin or theme causing the issue.
  • Increase PHP Memory Limit – Sometimes this JASON error occurs due to insufficient memory limit. You can increase the memory limit by adding the following code to your wp-config.php file – define(‘WP_MEMORY_LIMIT’, ‘256M’); this code will increase the limit to 256 megabytes.
  • Check your WordPress Site Address Setting – If the site settings of your WordPress dashboard are incorrect, the editor will not be able to communicate with the server. To check this, go to Settings> General and make sure that the site address (URL) and WordPress address (URL) fields are correct.
  • Fix your WordPress permalink structure – If your WordPress permalink is not configured correctly, it can also cause this error. To fix your permalink structure, go to Settings > Permalinks and select a permalink structure that works for you. Then, click Save Changes.
  • Regenerate your WordPress .htaccess file – If you’ve set up a custom permalink structure, you might have to recreate the .htaccess file for WordPress. To do this, go to Settings > Permalinks and click the Save Changes button. WordPress will automatically regenerate the .htaccess file.
  • Disable Security Plugins or Firewall – If you are using any security plugin or firewall, consider disabling it temporarily. It is possible that they could be stopping the JASON response. If this solves the issue, you can adjust the security plugin or firewall setting to allow the JASIN response.
  • Update WordPress Core, Plugins, and Themes – Sometimes, when your WordPress, plugins, and themes are not updated to the latest version they can create problems that result in an “Updating Failed” error. To prevent such conflict, make sure your WordPress, plugins, and themes are updated with the latest version.
  • Check your site health – Go to Tools > Site Health and click the Status tab. Scan your site for any issues that could be causing the error. If any problems are found, WordPress will provide recommendations on how to fix them.

By following these steps you should be able to fix the “Updating Failed. The Response is Not a Valid JSON Response” error in WordPress.

Note – Remember, before making any changes to your site, make sure to always create a backup of your website to ensure that you can restore it if anything goes wrong.

Additional Tips for Troubleshooting the “Updating Failed. The Response is Not a Valid JSON Response”

If you have tried the above steps and you still having trouble fixing the “Updating Failed. The Response is Not a Valid JSON Response” error, here we share some additional troubleshooting tips:

  • Try clearing the browser cache and cookies
  • Try disabling browser extensions
  • Try using a different browser
  • Check server configuration
  • Temporarily switch to the Classic Editor
  • Try disabling your WordPress debug mode


Q: What causes the “Updating Failed. The Response is Not a Valid JSON Response” error?

Ans: There could be many causes but some of them are – Incorrect WordPress site address settings, Permalinks issues, Theme or plugin conflicts, Firewall issues, and Other server issues.

Q: Can I need professional help to solve this error?

Ans: If you have tried all the above steps and still not been able to fix the JASON error, it is good to seek professional help from the WordPress developer or your hosting provider. They can figure out the problem and help you to fix it effectively.


“Updating Failed. The Response is Not a Valid JSON Response” in WordPress can occer from various reasons, including outdated versions, conflicts between plugins or themes, server problem, and more.By following the above steps you should be able to identify and fix the issue.

That’s it! Now you have learned How to Fix “Updating Failed. The Response is Not a Valid JSON Response” in WordPress.

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