The “jQuery is not defined” error in WordPress occurs when the jQuery library is not loaded or is not loaded correctly. This can happen for a number of reasons, including:
- A plugin or theme is not loading jQuery correctly.
- The jQuery library is not installed on your server.
- The jQuery library is not compatible with your WordPress version.
To fix the “jQuery is not defined” error, you can try the following:
- Check if jQuery is loaded correctly. You can do this by using the Network tab in your browser’s developer tools to see if the jQuery library is being loaded. If it is not, then you need to make sure that the jQuery library is installed on your server and that it is being loaded correctly.
- Disable any plugins or themes that you think might be causing the error. To do this, go to Appearance > Themes and deactivate any themes that you think might be causing the error. Then, go to Plugins and deactivate any plugins that you think might be causing the error. Once you have deactivated all of the plugins and themes, try reloading your website to see if the error is still occurring. If it is not, then you can start activating plugins and themes one at a time until you find the one that is causing the error.
- Update your WordPress version. If you are using an older version of WordPress, then you may need to update to a newer version in order to fix the “jQuery is not defined” error.
If you have tried all of the above and you are still getting the “jQuery is not defined” error, then you may need to contact your web hosting provider for assistance.