Mijrotik Hitspot

Hi Sir,
We are facing an issue with the radius server.
When I’m trying to log in a user, which is created by the user-manager portal of Mikrotik. It’s showing me an error that "Radius server is not responding. Please help. We have a Router Board 1100AHx4.

Please check your all setup. or help this video for you.
https://www.youtube.com/watch?v=BNq_en5irD8&t=415s