If you still see this issue please send a ticket in as it may be a file bugging up. If the server is brand new than running the update/validate should fix the problem.
You can add a sub user through your panel. Within there click your account area at the top left to display a drop down. Within there you will see the sub user section to add them in.
For this game it would depend on the developers releasing server files for it. If they do indeed release server files than we will more than likely offer it. Same for Moria.
If you are seeing an unknown issue this is due to the server box being down. There is no real way to fix it on your end and we would need to get it back up on our end or through the data center.