Sometimes, a 404 error occurs when an outdated bundle link is used in your store's navigation. This means that your customer might have clicked a menu item that still points to an old bundle link. Since the link is no longer active, the customer will see a 404 error page.
To fix the 404 error, follow these steps:
Go to your store's online settings and navigate to the "Navigation" section.
Check which menu is causing the error and update the bundle link for that specific menu. This will ensure that customers are directed to the correct, active bundle.