Due to a security upgrade which was required to be applied, and absence of a webmaster volunteer, there are some wiki issues.
I will try to fix this over the next days.
mboxes are somewhat fixed. At least now the text is visible again as a stopgap. The boxes we used previously are insane. Their implementation is incredibly complex. It requires a mediawiki extension to process lua scripts and then “thousands” of Module: and whenever you get closer to importing them all, another obscure error occurs.
So it’s now simple wiki template Template:Mbox - Whonix which looks worse than before but at least works. Anyone with some mediawiki / html / css knowledge could make it more pretty.