Server was rebooted, now it won't come back up properly - URGENT

I have an older cPanel build overdue for an upgrade.  Last night I cleaned up some domains in preparation for migrating to a new server build.  After rebooting the server, it didn't come back up. I didn't touch any system files, only domain files.  I don't know how deleting files within domains could have affected the rebooting of the server.  I have been working with the server-side techs and I got this reply:

"The server is currently failing to boot because the system is unable to correctly recognize the root filesystem during startup.

The exact error is here:
[ 187.156621 ] dracut-initqueuel3281: Warning: dracut-initqueue timeout - starting timeout scripts
[ 188.714951 ] dracut-initqueuel3281: Warning: Could not boot.
[ 188.7711051 ] dracut-initqueuel3281: Warning: /dev/disk/by-uuid/50f14549-8ca5-4c4e-bdc0-60b6d0bdadb5 does not exist

There is no data loss and the RAID itself is healthy. The issue is limited to how the system detects the disk at boot time.

As we have checked, the system is trying to locate your root partition during boot, but it is being incorrectly identified as a “jmicron_raid_member” instead of the expected “ext4” file system.

blkid /dev/md126
/dev/md126: TYPE="jmicron_raid_member"

file -s /dev/md126
/dev/md126: Linux rev 1.0 ext4 filesystem data, UUID=50f14549-8ca5-4c4e-bdc0-60b6dObdadb5 (extents) (64bit) (large files) (huge files)"

I do not know the cPanel and OS version as I can't get to the server to find them out.  I know I am running on CentOS/WHM that have been obsoleted, hence the reason for my server migration prep.

Their techs don't seem to know how to proceed other than booting with a rescue CD so the data can be copied.  I am hoping there is a cPanel support person who recognizes the error they identified and might know of a way to get the server to boot properly.

I have customer domains on the server, and as you can imagine, there are a lot of unhappy people at the moment.

Thanks for any help you have to offer.

Lew