Good day @itsu60/@linhhndt, Thank you for posting to the PayPal community. Can you please try now connecting via your primary email address of PayPal Business account. Please make sure your PayPal Business account is verified and confirmed without any account limitations. Steps to integrate Checkout with Shopify. Here's how: Log in to your Shopify admin panel. Click Settings. Click Payments. Select PayPal Express Checkout within the PayPal module. Click Activate. Once directed to a PayPal login page, log in to your PayPal account and click I Give Permission. Click Back to Shopify. Under Payment Authorization, select: Automatically capture payments for orders (Immediate Sale). Manually capture payment for orders (Authorize only). Click Save. https://www.paypal.com/gf/smarthelp/article/how-do-i-integrate-express-checkout-with-shopify-ts1797 If your still facing any issues, please create a MTS ticket via - https://www.paypal-support.com/s/?language=en_US with the detail information and error details. Sincerely, Chiranjeevi PayPal/Braintree MTS If this post or any other was helpful, please enrich the community by giving kudos or accepting it as a solution.
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