Steps to reproduce:
- Open the 2017WTE
- Create a redirect (or change an existing one)
- Preview (maybe it'll show me whether I linked the right page? I hope so!)
- See nothing on the preview page except for the =Level 1 title=.
Either it's going to show me something useful, or it's not going to show me anything. "Useful" could be a [[blue link]] (or a red link, if I mistyped the target page), a preview of the linked page with a link about redirecting it, or a note that says there's nothing to preview, but useful is not what we've got.
User:NicolascrafterMC reported this problem at https://www.mediawiki.org/wiki/Topic:Uy00lv65uy3amdka