I just found that my domain name is missing from my WHM yesterday.

CPANEL shows this on the top:

Welcome yourdomain.com! domain name is not correct
[an error occurred while processing this directive]
[an error occurred while processing this directive]
MySQL Databases : Sorry, your Cpanel Config file is missing your dns info. / unlimited
Ftp Accounts : [an error occurred while processing this directive]0 / unlimited

I tried to google and found few tips:

The username file exist inside
- /var/cpanel/users
- /var/cpanel/bandwidth

WHM > Edit DNS Zone also shows the domain name correctly.

Any idea how to fix this issue?