Nibbles Unreachable

I’m trying to do nmap scanning on Nibbles and I got the massage that the host is unreachable. I checked it through the dashboard and its up. Any advice.

Hey mashaan, As per what I see that nibbles is in the list of retired machines. HTB allows only 2 retired machines per week (marked with blue upward arrow) for free users. Therefore you are not able to access this box. But If you are paid then only you can access any no of retired machines.