In Send HTTP request action you can send cross-domain requests. In this case you may receive an error 'Failed to execute action "Send HTTP request": failed to request url' in the Modern Forms or List Actions. One of the reasons of this issue is CORS error.
You can observe this error on the Network tab in developer tools (F12).
In order to overcome this error, we have implemented new option 'Use proxy server to fix CORS error'.
When you check this option, request will go through our proxy server - 'proxy.skybow.com'