just got the hosting
Jamroom Hosting
I use namecheap ( https://www.namecheap.com ) for my domain names, you can use whoever you like.

You have 2 domain names on Jamroom Hosing, the ???.jamroomhosting.com one is online regardless of your name server settings, so you can use that one to setup while waiting for the name server changes to kick in. can take up to 24 hours.
See them both here:
https://www.jamroom.net/dianebrooks/hosting/server_settings/355
(not sure if you want your domain name posted in the forums or not, hence the link. click on the domain name to go to it.)
Where are you seeing that error? It doesnt look like a normal jr error.