Written by Admin on 2025-05-06

Troubleshooting Error: 'WordPress call to a member function canonical() on null Woocommerce'

If you are a WordPress user running the popular eCommerce plugin, Woocommerce, you may encounter the error "WordPress call to a member function canonical() on null Woocommerce". This error is caused by a conflict between Woocommerce and your WordPress theme or other plugins. In this article, we will guide you through the steps you can take to troubleshoot and resolve this issue.

What does the Error Mean?

The error message "WordPress call to a member function canonical() on null Woocommerce" indicates that there is an issue with a function call in the code. This usually happens as a result of a missing or broken reference to an object or variable in the code. The error message specifically relates to the canonical() function which is a part of WordPress core that is responsible for generating the canonical URL for a page.

Steps to Troubleshoot the Error

1. Disable Your Theme

The first step in troubleshooting this error is to disable your WordPress theme and check if the error message persists. To do this, go to Appearance > Themes and activate one of the default WordPress themes such as Twenty Twenty-One or Twenty Twenty. If the error message disappears, it means that the issue lies within your theme. You can then contact your theme developer for support to resolve the issue.

2. Disable Woocommerce and Other Plugins

If disabling your theme did not resolve the issue, the next step is to disable Woocommerce and other plugins and check if the error persists. To do this, go to Plugins and deactivate Woocommerce and any other plugins that are not essential to your site's functionality. Once you have done this, check if the error message still appears. If it disappears, reactivate each plugin one at a time and test your site after each activation until you identify the plugin causing the conflict.

3. Update Woocommerce and WordPress Core

If you have tried disabling your theme and plugins, and the error is still present, you may need to update your Woocommerce and WordPress core to the latest version. Outdated plugins or core files can cause conflicts with newer versions of WordPress or other plugins, resulting in errors such as this one. To update Woocommerce, go to Plugins > Installed Plugins and click 'Update' next to the Woocommerce plugin. To update WordPress core, go to Dashboard > Updates and click 'Update Now'.

Conclusion

The error "WordPress call to a member function canonical() on null Woocommerce" can be frustrating, but by following the steps outlined in this guide, you will be able to identify the root cause and resolve the issue. Remember to always keep your WordPress and Woocommerce installations up to date, and to use a reliable theme and plugins to minimize the risk of conflicts and errors.