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/7be47bd0c643773cce554749c276d5b3.gif" -- '\Large \small3x+1=5'
returned status = 126
Image not found!
Please try the debugging script