Fix the “Publishing failed. The response is not a valid JSON response” Error in WordPress


WordPress is a powerful and widely used content management system, but like any software, it can sometimes encounter errors. One such error that users may come across is the “Publishing failed. The response is not a valid JSON response” message. This error can be frustrating, especially when you’re trying to publish or update content on your website. In this article, we will explore common causes of this issue and provide step-by-step solutions to help you fix it.

.htaccess File: The .htaccess file in your WordPress root directory plays a crucial role in managing website configurations. Corrupted or misconfigured .htaccess files can lead to publishing errors. To fix this, you can generate a new .htaccess file by going to Settings > Permalinks and clicking the “Save Changes” button.

Plugin Conflicts: Plugins can sometimes conflict with each other or with the WordPress core, leading to errors during publishing. Deactivate all your plugins and attempt to publish again. If the error disappears, reactivate your plugins one by one until you identify the culprit. Once you’ve identified the problematic plugin, check for updates or seek an alternative that is compatible with your WordPress version.

Theme Compatibility: Your WordPress theme may also be causing conflicts that result in the JSON response error. Switch to a default WordPress theme (such as Twenty Twenty-One) and try publishing again. If the error is resolved, it indicates that your theme is causing the problem. Update your theme to the latest version or contact the theme developer for assistance.

Update WordPress Core: Ensure that you are using the latest version of WordPress. Outdated versions may contain bugs that have been addressed in newer releases. Always make sure to back up your site before updating WordPress to prevent potential data loss.


Enable WordPress debugging to get more information about the error. Edit your wp-config.php file and set WP_DEBUG to true. This will display detailed error messages on the screen, helping you pinpoint the issue.

define( 'WP_DEBUG', true );

define( 'WP_DEBUG_LOG', true );

define( 'WP_DEBUG_DISPLAY', false );

Server Configuration Issues:

Contact us by opening a support ticket to check if there are any server configuration issues.


Resolving the “Publishing failed. The response is not a valid JSON response” error in WordPress may require a combination of the above steps. It’s crucial to methodically troubleshoot each potential cause until the issue is resolved. If you find yourself unable to fix the problem, seeking assistance from WordPress forums, community groups, or professional developers can provide additional insights and solutions tailored to your specific situation.

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