Getting started issue

Meliodas

I am trying to migrate a huge WordPress community to NBB instance. But issue is it is not working properly. In digitalocean, after proper installation (I followed all the tutorials) it says "server is not responding". I am trying to use a special domain like .club for NBB. But when I try to install NBB with a .com or .net domain, it is working properly. Can someone clarify this issue?

Also are there any paid themes available for NBB? Majestic V4 is not on sale any more.