Unable to connect to cloud

Hi
I got a new core a few days back. While trying to connect to cloud through App as well as CLI, I find the core to be stuck at flashing Green continuously.

I looked for the solution in past discussions from which I found FW needs to be upgraded.
I did that as well through DFU UTIL. But still not able to move beyond green.

Making me frustrated :(. What is the next step?

Regards

What type of WiFi network are you connected to?

Does it require you to sign in to a webpage before you can use it?