Error during database dump

While the script seems to be working, I get the error:

'Regenerating DB list file.. Dumping SQL Databases.. mysqldump: Got error: 1142: "SELECT, LOCK TABLES command denied to user 'root'@'localhost' for table 'accounts'" when using LOCK TABLES'

CentOS 7, MariaDB 10.1.20, PHP 7.0.14

I realize this hasn't been updated for a while, but any advise would appreciated as this is a great script.