User blog comment:MisterWoodhouse/The first Unified Community Platform release is now live for NEW wikis/@comment-168424-20200313172542/@comment-168424-20200314021843

Looks like I was not the only victim of the screwed up starter wiki. This wiki has the same problem (Template:MessageBox exists on starter, but not this wiki): https://kadaashitestwiki.fandom.com/wiki/Template:MessageBox