The mediawiki program seems to be broken for the synology device. When I try to access the page I get
Exception encountered, of type "InvalidArgumentException"
or
"Notice: Object of class Closure could not be converted to int in /volume1/web/MediaWiki/includes/libs/objectcache/WANObjectCache.php on line 801 Exception encountered, of type "InvalidArgumentException""
which has a little more information, but not enough for me to get it working again.