Today i was just checking my Cpanel and i got the error message as below:
Sorry for the inconvenience! The root partition on this server is running out of disk space. Cpanel operation has been temporarily suspended to prevent something bad from happening. Please ask your system admin to remove any files not in use on that partition.
Most of the times error will pop up when you try to access different features of WHM or cPanel.This error basically occurs when you are running out of disk space on your partition, If you are owner of the server and have an access to the root partition,You can do it as:
Delete/edit unneeded files now WHM features return to normal.