Written by Admin on 2025-05-06

Troubleshooting 'Call to a Member Function Query on Null' Error in WordPress

WordPress is a popular Content Management System (CMS) used by millions of website owners across the world. However, it is not immune to errors and issues, one of which is the 'Call to a Member Function Query on Null' error. This error can be frustrating, and it's essential to know how to fix it promptly.

Understanding the 'Call to a Member Function Query on Null' Error

The 'Call to a Member Function Query on Null' error occurs when you attempt to run a MySQL query on a non-object or null variable. It typically arises when a plugin or theme makes an incorrect call to the database or fails to retrieve data from it.

Common Causes of 'Call to a Member Function Query on Null' Error

The following are some common causes of the 'Call to a Member Function Query on Null' error:

1. Outdated or incompatible plugins or themes: Outdated or incompatible plugins or themes can interfere with WordPress database queries and cause errors.
2. Corrupted WordPress database: Whenever there is a database corruption, WordPress may fail to retrieve data from that database, and this can also trigger the 'Call to a Member Function Query on Null' error.
3. Poorly coded plugins or themes: If a plugin or theme has a coding error, it may trigger the 'Call to a Member Function Query on Null' error.
4. Server configuration issues: Sometimes, server issues such as low memory, incorrect file permissions, or limited disk space can cause the error.

How to Fix the 'Call to a Member Function Query on Null' Error

There are several ways to fix the 'Call to a Member Function Query on Null' error, depending on the cause. Here are some of the solutions you can try:

1. Deactivating plugins or themes: Deactivating plugins or themes that might be causing the error is the first troubleshooting step. You can do this by accessing your WordPress dashboard, navigating to the 'Plugins' section and disabling one plugin at a time to determine the culprit. Similarly, you can switch to a default WordPress theme to ascertain if your current theme is the root cause.
2. Repairing your database: You can repair your database by using a plugin like WP-DBManager or by running the 'Repair Database' tool in the database management section of your website hosting account.
3. Increasing server resources: You can also increase your server resources by upgrading your hosting plan or contacting your hosting provider to allocate more resources.
4. Debugging the theme or plugin code: Finally, debugging the code by correcting syntax errors and optimizing MySQL queries can help resolve the issue.

Conclusion

Getting the 'Call to a Member Function Query on Null' error in WordPress can be a frustrating experience when, for example, you want to update a website or add new content. It's important to identify the cause of the error and use the right troubleshooting steps to fix it. With the solutions outlined above, you can get your website back up and running in no time.