3.10 entries won't delete

I upgraded several sites to 3.10 over the past few days and for only those websites, I cannot delete any CMSB entries.  Everythign else works. You can add entries, modify them,etc but cannot delete them. If I click delete, I get the following error:

(An unexpected error occurred: #14085) (An unexpected error occurred: #14086) (An unexpected error occurred: #14087) MySQL Error: Access denied for user 'root'@'localhost' (using password: NO)

I checked the setting file and everything is in order from what I can tell. Proper username and password to the MySQL database is there.

I didn't think we had to use MySQLi yet.  These are just basic websites with no extra coding or programming. Is there something I am missing here?

In the PHP error logs, I see:

E_WARNING: mysql_query(): Access denied for user 'root'@'localhost' (using password: NO)

E_WARNING: mysql_query(): A link to the server could not be established

E_DEPRECATED: mysql_query(): The mysql extension is deprecated and will be removed in the future: use mysqli or PDO instead