The purge link does not show correctly in Vector out of the box. A MediaWiki page must be created, but this should all happen automatically.
Topic on Extension talk:Purge
Well, if there is no page, nothing needs to be purged I guess?
Misplaced bug report that should've been on GitHub (self-admitting to this mistake). Latest versions fix this, anyway.
The purge link does not show correctly in Vector out of the box. A MediaWiki page must be created, but this should all happen automatically.