via developer.woocommerce.com => original post link
A new version of WooCommerce Blocks has been released! Version 6.7.1 is now available for download from GitHub and WordPress.org.
This is a patch release to fix the payment_data[0] [value] is not of type string.boolean error users were seeing in the Checkout block when trying to pay with their saved cards. This was a regression introduced in version 6.6.0.
For more details checkout the Changelog below.