After registering the mini-program, you need to log in to the mini-program backend to bind the server domain name and business domain name.

In the mini-program backend, left menu: Settings - Development Settings - Server Domain Name and Business Domain Name, add the mini-program domain name here.

Note: The domain name here must be filed.

After enabling the server domain name configuration, you only need to configure the request legal domain name and fill in the mini-program domain name.