Hi there,
The wiki was taken offline today to migrate over to the new system currently used by the documentation site, so my best guess is they are doing maintenance on that server as well.
I saw the same message, but was able to view that page after refreshing (F5) a couple times. Looks like it is just slower than usual, causing some strange errors.
If it’s still occurring by tomorrow morning (US eastern time), add another note for the staff to look into it further.
Thanks!