Critical error on checkout and cart page

Hello,

I’m sorry to hear about the critical error you are experiencing on the checkout and cart pages of your webshop. This issue could be related to a conflict with another plugin or theme on your website.

To troubleshoot this problem, I recommend confirming if it’s a bug or a conflict with another theme or plugin by performing a quick conflict check on your website. You can use the Health Check plugin to do this without affecting your website visitors.

Here are the steps to install and use the Health Check plugin:

1. Log in to your WordPress Administrator account and navigate to the dashboard.
2. Navigate to Plugins in the WordPress menu and then go to Add New.
3. Search for ‘Health Check’ in the search bar, click Install Now, and activate the Health Check & Troubleshooting plugin.
4. On the WordPress Menu, hover over Tools and click on Site Health.

Performing this conflict check will help identify if the issue is caused by a conflict with another plugin or theme. If Rank Math is causing the problem, updating all plugins and themes to their latest versions might resolve the issue.

If you need further assistance or have any other questions, please feel free to reach out to the Rank Math support team by opening a support ticket at Rank Math Support. They will provide you with more specific guidance based on your website’s configuration.

Thank you for bringing this concern to our attention. We are here to help you resolve this issue promptly.

Best regards.

Sources:
Confirming a Theme/Plugin Conflict With Rank Math
Fatal Error Happening on Some Installations After 1.0.49 Update » Rank Math
How to Fix Undefined Offset: 0 Warning » Rank Math