This error may happen when you try to use an API that requires a verification file that needs to be served from your web app root directory.
To solve the problem, you’ll need to add a custom nginx configuration for your web app on RunCloud. To do this, go to your RunCloud dashboard and select your web app.
Then select the NGINX Config option in the left menu and create a new configuration.
On the next screen, choose Apple Pay verification from the dropdown menu. This will automatically fill in the field with the necessary configuration. Finally, click on Save Config to deploy the changes.