Could not find server in in-game unofficial ARK server browser
This is a known issue, which sadly is caused by an in-game bug: The in-game server browser has a limit of 5000 servers. This is an issue since there are more than 10.000 ARK servers and there is no guarantee that your server will appear on the list.
We are still testing to see if we can find a pattern on this, but at the moment "luck" and patience seems to be the case.
We strongly recommend to register your server on a listing website such as ark-servers.net, if you are interested in getting new players.
You can also add the game server to your favourite server list via Steam or you can use the free community website to get direct access to your game server.