Fix No Access-Control-Allow-Origin header is present on the requested resource

Miscellaneous questions and troubleshooting
The browser is blocking a cross-domain request. Normally, the browser only allows requests within the same origin for security purposes.
To enable cross-domain requests, you can add the following code to the web.config file of the remote site.
<?xml version="1.0" encoding="utf-8"?>
                <add name="Access-Control-Allow-Origin" value="*" />
This does not work for ASP.NET Core applications.
If you are using an ASP.NET Core application, please refer to the following guide: