The shell command
"/srv/www/0003_site/releases/4.1.17-6-dev/filter/tex/mimetex.linux" -e "/srv/www/0003_site/media/media_moodle/filter/tex/043cdb969445e537fe805025d5d51922.gif" -- '\Large \small \frac{3}{5}x+1=5'
returned status = 126
Image not found!
Please try the debugging script