So the HHVM error log is full of these:
Notice: Missing <code>texvccheck</code> executable. Please see math/README to configure. in /var/www/live/w/extensions/Math/MathInputCheckTexvc.php on line 65
So the HHVM error log is full of these:
Notice: Missing <code>texvccheck</code> executable. Please see math/README to configure. in /var/www/live/w/extensions/Math/MathInputCheckTexvc.php on line 65