Board Thread:Support Requests - Designing Your Wiki/@comment-3499588-20171018032659/@comment-25014407-20171018033753

More information can be found here, but in a nutshell, if there's a message wall on the wiki, you have to use MediaWiki:Welcome-message-wall-user, and if you use a user talk page on the wiki, you have to use MediaWiki:Welcome-message-user.