Question about MariaDB Update (I have an error)

We are in the process of updating the MariaDB on a server but have gotten this error; " The system detected issues with the current "/etc/my.cnf" file. These issues may interfere with the upgrade to MariaDB" I loaded up the my.cnf file and here's what it looks like. [mysqld] innodb_file_per_table=1 default-storage-engine=MyISAM performance-schema=0 max_allowed_packet=268435456 open_files_limit=40000
Any idea's on what is wrong with this?