Error installing version 8.5.0
PDOException: SQLSTATE[HY000]  Can't initialize character set utf8mb4 (path: /usr/share/mysql/charsets/) in /var/www/html/c5_8_5/concrete/vendor/doctrine/dbal/lib/Doctrine/DBAL/Driver/PDOConnection.php:43
Version 8.4.5 installs without a problem.
The environment is: Centos6, php71, MariaDB10.3
I am assuming that there is some database setting required to support utf8mb4 but I can't find it.
Can anyone help?