Thread:Project:Support desk/Migrate MoinMoin Wiki to MediaWiki/reply (3)

"sysop" permission only means that the user must be member of the administrator user group. E.g. here for the German wp:

https://de.wikipedia.org/w/index.php?title=Spezial%3ABenutzer&username=&group=sysop&limit=50

The very first user in your install should have this right; otherwise rights can be edited on the wiki page Special:UserRights in your wiki. (For which page to use you by default have to be in the bureaucrat user group.)