We have a problem that we can’t solve. We’ve already deactivated plugins, updated the permalink, and nothing. It could help us, because when we complete a purchase the page is directed to a 404 page, and not to the order page.
So, until you get to the checkout page, it’s normal, the problem is when we checkout, so in this case it’s not directed to the order summary page, it’s directed to page 404, as you can see in the link below.
I deactivated all of them, except the payment method, otherwise there would be no way to test the error. And in this case it still kept directing to the 404 page.
Please make the full backup of your site and check the issue on the Storefront theme to detect if our theme causes the problem. Storefront is a free theme developed by WooСommerce.
Let us know if the problem occurs on WoodMart and provide valid access, we cannot enter.