Hello,

Please check how it works with the default wordpress theme just to check whether the issue is with our theme or not.

Because the MyAccount is default woocommerce functionality and our theme doesn’t influence.

If the register page is working fine with default theme then remain the plugin deactivated and share the wp logins details and confirm the permission for plugins deactivation, switching to the parent or default theme. As soon as we complete the testing we will enable it all back, however, the site would be without plugins for 15-20 min. You would better make the full backup of your site.

Best Regards.