Hello,
As your WooCommerce registration page is missing. Please navigate to Woocommerce > Settings > Account and privacy > enable Allow customers to create an account on the “My Account” page https://prnt.sc/oujue7
Aslo you need to make sure that you have my account page with the below shortcode:
[woocommerce_my_account]
That specific my account page must be selected from “My account page” dropdown from WooCommerce >> Settings >> My account page.
Screenshot for clarification: https://jmp.sh/63NHzBk
After doing this also check your dashboard pages after clearing your site and browser cache.
Best Regards.