Fris is currently being worked on, and httpd, ftp, and cPanel are down. It should be back up soon. If this problem persists, try flushing your DNS and clearing your cache.
Some of the server seems to be down. I've contacted an admin to find out whats wrong. Let you know as soon as I get an update.
Edit:
19:48 - Corey - RAID is verifying
19:48 - Corey - Took some services down until it's done, it's at 98%
It should be back shortly.
Try logging into cPanel from the account panel. If one website works then you should be able to login. The rest are probably still having their DNS updated.
The administrators are still working hard to fix all of the misconfiguration errors. Please read here. I assume by backend maintenance they mean mysql as well as misconfiguration errors like the one you are getting.
Please point your A records to 69.175.6.94 or have your nameservers changed to ns1.x10hosting.com and ns2.x10hosting.com and manage your dns record in cPanel.
Oops.. misread the the first asterisked statement and thought it said it was restored.. my bad.. But the x10Hosting status updates say the restores are completed, so it should be safe to upload.