I'm stuck in a loop of "continue to view order"

[yanzhishenying]

I am developing server-side code using Golang, based on the “github.com/plutov/paypal/v4”  lib.
I use the CreateOrder to create an order and obtained the "approval_url" link.

approval_url example www.paypal.com/checkoutnow?token=4K426****734723 
Then I open this approval_url link to test the payment, but I got stuck on the page shown in the picture. Clicking the button in the picture refreshes the page, but it does not proceed to the next step, and it's stuck in a loop on this page.

I also tested direct transfers and front-end no-code integrated payment links, and they are all functioning normally.