User blog comment:MisterWoodhouse/Social Activity, the 2010 Editor, and Unpausing Migrations/@comment-44657673-20201001155230/@comment-24006128-20201001155409

It's not a matter of access. It's whether or not your wiki has been migrated. yourwikiname.fandom.com/wiki/Special:Version will let you know if you're on legacy (v1.19) or UCP (v1.33)