If you still can find the server, then have the creator of it restart the game and server. As the game is new and running on its initial phase, some of the issues are acceptable right now. Your Stormworks: Build and Rescue server rental can be located in USA, UK, Germany, Finland, Singapore and Australia. the game is set to public so i have no idea what could be wrong im also using host havoc. If you want it to show up in the 7D2D public server listing, set this to true.
The Mordhau developers frequently update the Mordhau Server files, make sure to hit the Steam Update button once in a while or - schedule a Steam Update task via 'Scheduled If your server is not showing up in the Steam Server Browser or the Mordhau Server browser, there are three typical reasons why. (4) If all the above fails, please contact Nitrado Support to further investigate. Also if you do that you have to change your servers port to 27017 as the game already uses 27016 and adjust your port forwarding rule.