Thanks. I edited that already and it seemed to have no effect.
I've since edited the line starting: $lang['Solusvm.!error.solusvm_hostname.format']
And it appears to now work.
Thanks!
Simply means what it says. Perhaps you're attempting to log in with your email address instead of your admin username? That's probably the biggest issue people run into when logging in, since their username is not necessarily their email address.