As you may know, we did some server migrations in December and January, as announced here: https://x10hosting.com/community/threads/cpanel-migration-to-directadmin.206877/
This also lead to new IP addresses for the servers, for your server that is: 198.91.81.13
The old servers have now been taken offline and decommissioned, so if you didn't update the A record on CloudFlares name servers prior, the site will appear to be offline. The solution is to update the A record.