I tried doing Devel myself initially however found myself stuck at "sending stage" so I decided to read write ups (including the HTB offical write up) to see where I was going wrong but it was not clear. So I decided to follow the HTB write up and IppSec exactly however I still continue to keep running into the issue where my listener is hanging on "Sending Stage".
I have spent hours trying to solve this. Any assistance will be highly appreciated. I can provide more information if necessary.