Hi VAIRU. My name is Lester, and I am an Independent Advisor. I'm sorry that you are experiencing this issue. I'd be more than happy to assist you.
Is this the first time you have encountered this issue? Were you able to connect before? Can you connect to your Home Wi-Fi using the same device?
Try disabling the hotspot, waiting a few minutes, and then re-enabling it. If the issue persists, try to Reset the network settings: Start menu > Settings > Network and Internet > Advanced network settings > Network reset. Click Reset now and follow the on-screen instructions.
I hope this information is helpful. Please don't hesitate to reach out if you have any more questions. Thank you