Please deactivate all the 3rd party plugins and activate only theme-required plugins on the site and then check the issue. I am sure your issue will be solved. Then Activate the 3rd party plugins one by one and check which plugin is creating the issue for you.
Otherwise, if the issue still exists then keep the 3rd party plugins deactivated and let me know I will check and give you a possible solution. Also switch the child to parent theme.
Hi, So I did all you said and no change. nothing work, please look inside if you can. I left you admin access for the simple reason that it may take you a minute to figure out or less.
I have checked your site with the default theme and the issue still remains; it means it is not our theme issue. Try to contact woocommerce support. They will guide you better.