Why is phpMyAdmin asking for a username and password when attempting to log in with my root user?
It can be likely that the phpMyAdmin configuration has been corrupted or missing. The cause of this can be done by many factors, which are being tracked for future references.
At this time, if you are missing a configuration, it can be recreated using the following script:
This script rebuilds the phpMyAdmin configuration file from the template
included in the cPanel RPM.
PLEASE KEEP IN MIND: It will overwrite any manual changes you have
made to the config file!