Symptoms
A cPanel user is unable to log into phpMyAdmin and an error similar to the following is displayed.
mysqli_connect(): (28000/1045): Access denied for user 'cpses_username'@'localhost' (using password: YES)
Description
This issue occurs when the cPanel password and the database password become unsynced.
Workaround
Resetting the cPanel user's password will sync the user's passwords.