Receiving this error message means that Alipay has not been activated properly on your Stripe account.
When activated, Alipay should appear under the "Live" Tab on your Stripe Payment Methods, Settings > Payment Methods.
Please refer to Stripe's documentation for the reason of this error:
If your customer attempts to checkout with Alipay in the WeChat APP's native browser, they'll likely encounter this error below, which requires that the customer should copy and paste the URL into another mobile browser to complete payment.
Soon, we plan to implement a workaround that will detect the WeChat native browser and attempt to force or redirect the customer to another mobile browser so as to prevent this issue.
We have discovered an issue that is known by Stripe and being worked on by their team in collaboration with Alipay.
When customers attempt to scan the QR code generated on a desktop device, they may receive the following error:
"The order information cannot be read, it is recommended to contact the seller."
While Stripe/Alipay resolve this issue, please request your customers to fully complete the checkout process on your website via their mobile device (leave the desktop out of the checkout flow).
As soon as Stripe/Alipay fix this issue, it will work automatically and no update will be needed to the plugin or your site.