MediaWiki:Config-mysql-only-myisam-dep/en

Warning: MyISAM is the only available storage engine for MySQL on this machine, and this is not recommended for use with MediaWiki, because:
 * it barely supports concurrency due to table locking
 * it is more prone to corruption than other engines
 * the MediaWiki codebase does not always handle MyISAM as it should

Your MySQL installation does not support InnoDB, maybe it's time for an upgrade.