Written by Admin on 2025-05-06

Why "Uncaught TypeError: Cannot Read Property 'data' of Null" Occurs in WordPress?

If you have been working on WordPress for some time, chances are you have come across the error message "Uncaught TypeError: Cannot Read Property 'data' of Null". This error can be frustrating and may prevent your website from functioning correctly. In this article, we will explore the reasons behind this error and how to fix it.

Understanding the Error

The error message "Uncaught TypeError: Cannot Read Property 'data' of Null" is a JavaScript error. It occurs when the code attempts to access the 'data' property of a null object. In simpler terms, it means that the code is not able to find an object that it needs to access.

Reasons Behind the Error

There can be various reasons why this error occurs on your WordPress website. Here are some of the most common causes:

1. Plugin or Theme Issues: If you recently installed or updated a plugin or theme, it might cause a conflict with other plugins or themes, resulting in the error message.

2. JavaScript Conflicts: If there are multiple JavaScript files on the page, it might result in conflicts and cause the error message.

3. Poorly Coded Plugins or Themes: Poorly coded themes or plugins can cause all sorts of issues on a WordPress website, including the "Uncaught TypeError" error.

How to Fix the Error

Now that we know the reasons behind the error, let's look at some ways to fix it.

1. Disable All Plugins: If the error message occurred after installing or updating a plugin, try disabling all plugins and then reactivating them one by one to identify the problematic plugin.

2. Switch to Default Theme: If the error occurred after installing or updating a theme, switch to a default WordPress theme like Twenty Twenty-One to see if the issue persists.

3. Check for JavaScript Conflicts: If there are multiple JavaScript files on the page, try disabling them one by one to identify the conflicting file.

4. Contact the Plugin or Theme Developer: If the error message is caused by a plugin or theme, contact the developer for assistance. They might have a fix or a troubleshooting guide to follow.

Conclusion

The "Uncaught TypeError: Cannot Read Property 'data' of Null" error message can be frustrating and may prevent your WordPress website from functioning correctly. However, by understanding the reasons behind the error and applying the fixes mentioned above, you can resolve the issue and get your website running smoothly again.