Sorry for troubling again.
I got this message “Please copy and paste this information in your ticket when contacting support” details as below:
Shop base: #341 - /shop/
Cart: #342 - /cart/
Checkout: #343 - /checkout/
My account: #344 - /my-account/
Terms and conditions: Page not set
Name: Sydney Pro
Author URL: http://athemes.com
Child Theme: – If you are modifying WooCommerce on a parent theme that you did not build personally we recommend using a child theme. See: How to create a child theme
Overrides: sydney-pro-ii/woocommerce/single-product/add-to-cart/simple.php version 3.0.0 is out of date. The core version is 3.4.0
Wondering if you could let me know how to solve the problem? will be waiting=) thanks for your time!