[WIKI] Failed to parse (Missing texvc executable)

[Regina Henschel]

Hi all,

I can no longer enter a formula (for example <math>\sum_{k=1}^N 
k^2</math>), but I get the error in German "Parser-Fehler (Das 
texvc-Programm wurde nicht gefunden. Bitte math/README beachten.)" which 
is the translated "Failed to parse (Missing texvc executable. Please 
notice math/README)"

Perhaps something missing in the setup of MediaWiki at Apache?

Kind regards
Regina